diff --git a/include/async_mqtt5/impl/assemble_op.hpp b/include/async_mqtt5/impl/assemble_op.hpp
index 018a7c8..5c96930 100644
--- a/include/async_mqtt5/impl/assemble_op.hpp
+++ b/include/async_mqtt5/impl/assemble_op.hpp
@@ -89,7 +89,7 @@ public:
 			_read_buff.cbegin(), _data_span.first()
 		);
 		_read_buff.resize(
-			_svc.connect_prop(prop::maximum_packet_size).value_or(max_recv_size)
+			_svc.connect_property(prop::maximum_packet_size).value_or(max_recv_size)
 		);
 		_data_span = {
 			_read_buff.cbegin(),
@@ -157,7 +157,7 @@ public:
 		}
 
 		auto recv_size = static_cast<size_t>(
-			_svc.connect_prop(prop::maximum_packet_size).value_or(max_recv_size)
+			_svc.connect_property(prop::maximum_packet_size).value_or(max_recv_size)
 		);
 		if (*varlen > recv_size - std::distance(_data_span.first(), first))
 			return complete(client::error::malformed_packet, 0, {}, {});
diff --git a/include/async_mqtt5/impl/async_sender.hpp b/include/async_mqtt5/impl/async_sender.hpp
index c222e4d..3ffe913 100644
--- a/include/async_mqtt5/impl/async_sender.hpp
+++ b/include/async_mqtt5/impl/async_sender.hpp
@@ -147,7 +147,7 @@ public:
 		// all the packets that require resending.
 		_write_in_progress = true;
 
-		auto new_limit = _svc._stream_context.connack_prop(prop::receive_maximum);
+		auto new_limit = _svc._stream_context.connack_property(prop::receive_maximum);
 		_limit = new_limit.value_or(MAX_LIMIT);
 		_quota = _limit;
 
diff --git a/include/async_mqtt5/impl/client_service.hpp b/include/async_mqtt5/impl/client_service.hpp
index ed1121e..df3f811 100644
--- a/include/async_mqtt5/impl/client_service.hpp
+++ b/include/async_mqtt5/impl/client_service.hpp
@@ -62,20 +62,25 @@ public:
 	}
 
 	template <typename Prop>
-	const auto& connack_prop(Prop p) const {
+	const auto& connack_property(Prop p) const {
 		return _mqtt_context.ca_props[p];
 	}
 
-	const auto& connack_props() const {
+	const auto& connack_properties() const {
 		return _mqtt_context.ca_props;
 	}
 
 	template <typename Prop>
-	const auto& connect_prop(Prop p) const {
+	const auto& connect_property(Prop p) const {
 		return _mqtt_context.co_props[p];
 	}
 
-	void connect_props(connect_props props) {
+	template <typename Prop>
+	auto& connect_property(Prop p) {
+		return _mqtt_context.co_props[p];
+	}
+
+	void connect_propertiess(connect_props props) {
 		_mqtt_context.co_props = std::move(props);
 	}
 
@@ -123,20 +128,25 @@ public:
 	}
 
 	template <typename Prop>
-	const auto& connack_prop(Prop p) const {
+	const auto& connack_property(Prop p) const {
 		return _mqtt_context.ca_props[p];
 	}
 
-	const auto& connack_props() const {
+	const auto& connack_properties() const {
 		return _mqtt_context.ca_props;
 	}
 
 	template <typename Prop>
-	const auto& connect_prop(Prop p) const {
+	const auto& connect_property(Prop p) const {
 		return _mqtt_context.co_props[p];
 	}
 
-	void connect_props(connect_props props) {
+	template <typename Prop>
+	auto& connect_property(Prop p) {
+		return _mqtt_context.co_props[p];
+	}
+
+	void connect_properties(connect_props props) {
 		_mqtt_context.co_props = std::move(props);
 	}
 
@@ -267,22 +277,27 @@ public:
 	}
 
 	template <typename Prop>
-	const auto& connect_prop(Prop p) const {
-		return _stream_context.connect_prop(p);
-	}
-
-	void connect_props(connect_props props) {
-		if (!is_open())
-			_stream_context.connect_props(std::move(props));
+	const auto& connect_property(Prop p) const {
+		return _stream_context.connect_property(p);
 	}
 
 	template <typename Prop>
-	const auto& connack_prop(Prop p) const {
-		return _stream_context.connack_prop(p);
+	auto& connect_property(Prop p) {
+		return _stream_context.connect_property(p);
 	}
 
-	const auto& connack_props() const {
-		return _stream_context.connack_props();
+	void connect_properties(connect_props props) {
+		if (!is_open())
+			_stream_context.connect_properties(std::move(props));
+	}
+
+	template <typename Prop>
+	const auto& connack_property(Prop p) const {
+		return _stream_context.connack_property(p);
+	}
+
+	const auto& connack_properties() const {
+		return _stream_context.connack_properties();
 	}
 
 	void run() {
diff --git a/include/async_mqtt5/impl/disconnect_op.hpp b/include/async_mqtt5/impl/disconnect_op.hpp
index 794f149..f15d673 100644
--- a/include/async_mqtt5/impl/disconnect_op.hpp
+++ b/include/async_mqtt5/impl/disconnect_op.hpp
@@ -72,7 +72,7 @@ public:
 		);
 
 		auto max_packet_size = static_cast<size_t>(
-			_svc_ptr->connack_prop(prop::maximum_packet_size)
+			_svc_ptr->connack_property(prop::maximum_packet_size)
 				.value_or(default_max_send_size)
 		);
 		if (disconnect.size() > max_packet_size)
diff --git a/include/async_mqtt5/impl/publish_send_op.hpp b/include/async_mqtt5/impl/publish_send_op.hpp
index 8b19c35..bb526bf 100644
--- a/include/async_mqtt5/impl/publish_send_op.hpp
+++ b/include/async_mqtt5/impl/publish_send_op.hpp
@@ -121,7 +121,7 @@ public:
 		);
 
 		auto max_packet_size = static_cast<size_t>(
-			_svc_ptr->connack_prop(prop::maximum_packet_size)
+			_svc_ptr->connack_property(prop::maximum_packet_size)
 				.value_or(default_max_send_size)
 		);
 		if (publish.size() > max_packet_size)
@@ -355,9 +355,9 @@ private:
 		if (validate_topic_name(topic) != validation_result::valid)
 			return client::error::invalid_topic;
 
-		auto max_qos = _svc_ptr->connack_prop(prop::maximum_qos)
+		auto max_qos = _svc_ptr->connack_property(prop::maximum_qos)
 			.value_or(default_maximum_qos);
-		auto retain_available = _svc_ptr->connack_prop(prop::retain_available)
+		auto retain_available = _svc_ptr->connack_property(prop::retain_available)
 			.value_or(default_retain_available);
 
 		if (uint8_t(qos_type) > max_qos)
@@ -382,7 +382,7 @@ private:
 
 		auto topic_alias = props[prop::topic_alias];
 		if (topic_alias) {
-			auto topic_alias_max = _svc_ptr->connack_prop(prop::topic_alias_maximum)
+			auto topic_alias_max = _svc_ptr->connack_property(prop::topic_alias_maximum)
 				.value_or(default_topic_alias_max);
 
 			if (topic_alias_max == 0 || *topic_alias > topic_alias_max)
diff --git a/include/async_mqtt5/impl/subscribe_op.hpp b/include/async_mqtt5/impl/subscribe_op.hpp
index 80dc884..3846a33 100644
--- a/include/async_mqtt5/impl/subscribe_op.hpp
+++ b/include/async_mqtt5/impl/subscribe_op.hpp
@@ -81,7 +81,7 @@ public:
 		);
 
 		auto max_packet_size = static_cast<size_t>(
-			_svc_ptr->connack_prop(prop::maximum_packet_size)
+			_svc_ptr->connack_property(prop::maximum_packet_size)
 				.value_or(default_max_send_size)
 		);
 		if (subscribe.size() > max_packet_size)
@@ -169,10 +169,10 @@ private:
 	}
 
 	error_code validate_topic(const subscribe_topic& topic) const {
-		auto wildcard_available = _svc_ptr->connack_prop(
+		auto wildcard_available = _svc_ptr->connack_property(
 			prop::wildcard_subscription_available
 		).value_or(1);
-		auto shared_available = _svc_ptr->connack_prop(
+		auto shared_available = _svc_ptr->connack_property(
 			prop::shared_subscription_available
 		).value_or(1);
 
@@ -208,7 +208,7 @@ private:
 		if (!sub_id.has_value())
 			return error_code {};
 
-		auto sub_id_available = _svc_ptr->connack_prop(
+		auto sub_id_available = _svc_ptr->connack_property(
 			prop::subscription_identifier_available
 		).value_or(1);
 
diff --git a/include/async_mqtt5/impl/unsubscribe_op.hpp b/include/async_mqtt5/impl/unsubscribe_op.hpp
index 8b11f84..e9dd266 100644
--- a/include/async_mqtt5/impl/unsubscribe_op.hpp
+++ b/include/async_mqtt5/impl/unsubscribe_op.hpp
@@ -76,7 +76,7 @@ public:
 		);
 
 		auto max_packet_size = static_cast<size_t>(
-			_svc_ptr->connack_prop(prop::maximum_packet_size)
+			_svc_ptr->connack_property(prop::maximum_packet_size)
 				.value_or(default_max_send_size)
 		);
 		if (unsubscribe.size() > max_packet_size)
diff --git a/include/async_mqtt5/mqtt_client.hpp b/include/async_mqtt5/mqtt_client.hpp
index 0120b67..2c08a5a 100644
--- a/include/async_mqtt5/mqtt_client.hpp
+++ b/include/async_mqtt5/mqtt_client.hpp
@@ -274,8 +274,35 @@ public:
 		return *this;
 	}
 
+	/**
+	 * \brief Assign \__CONNECT_PROPS\__ that will be sent in a \__CONNECT\__ packet.
+	 * \param props \__CONNECT_PROPS\__ sent in a \__CONNECT\__ packet.
+	 * \see See \__CONNECT_PROPS\__ for all eligible properties.
+	 */
 	mqtt_client& connect_properties(connect_props props) {
-		_svc_ptr->connect_props(std::move(props));
+		_svc_ptr->connect_properties(std::move(props));
+		return *this;
+	}
+
+	/**
+	 * \brief Assign a property that will be sent in a \__CONNECT\__ packet.
+	 * \param prop The \__CONNECT_PROPS\__ property to set.
+	 * \param value Value that will be assigned to the property.
+	 *
+	 * \par Example
+	 * \code
+	 * client.connect_property(prop::session_expiry_interval, 40); // ok
+	 * client.connect_property(prop::reason_string, "reason"); // does not compile, not a CONNECT prop!
+	 * \endcode
+	 *
+	 * \see See \__CONNECT_PROPS\__ for all eligible properties.
+	 */
+	template <prop::property_type p>
+	mqtt_client& connect_property(
+		std::integral_constant<prop::property_type, p> prop,
+		prop::value_type_t<p> value
+	) {
+		_svc_ptr->connect_property(prop) = value;
 		return *this;
 	}
 
@@ -296,21 +323,30 @@ public:
 	 * For all properties, the return type will be `std::optional` of their respective value type.
 	 * For `async_mqtt5::prop::user_property`, the return type is `std::vector<std::string>`.
 	 *
-	 * \param prop The \__CONNACK\__ property value to retrieve.
+	 * \param prop The \__CONNACK_PROPS\__ property value to retrieve.
 	 *
 	 * \par Example
 	 * \code
-	 *	std::optional<std::string> auth_method = client.connection_property(async_mqtt5::prop::authentication_method); // ok
-	 *	std::optional<std::string> c_type = client.connection_property(async_mqtt5::prop::content_type); // does not compile!
+	 *	std::optional<std::string> auth_method = client.connack_property(async_mqtt5::prop::authentication_method); // ok
+	 *	std::optional<std::string> c_type = client.connack_property(async_mqtt5::prop::content_type); // does not compile, not a CONNAK prop!
 	 * \endcode
 	 *
 	 * \see See \__CONNACK_PROPS\__ for all eligible properties.
 	 */
 	template <prop::property_type p>
-	const auto& connection_property(
-			std::integral_constant<prop::property_type, p> prop
+	const auto& connack_property(
+		std::integral_constant<prop::property_type, p> prop
 	) const {
-		return _svc_ptr->connack_prop(prop);
+		return _svc_ptr->connack_property(prop);
+	}
+
+	/**
+	 * \brief Retrieves the \__CONNACK_PROPS\__ from the last \__CONNACK\__ packet received.
+	 *
+	 * \see See \__CONNACK_PROPS\__ for all eligible properties.
+	 */
+	const connack_props& connack_properties() const {
+		return _svc_ptr->connack_properties();
 	}
 
 	/**
diff --git a/test/unit/include/test_common/packet_util.hpp b/test/unit/include/test_common/packet_util.hpp
index c57f49c..aa186d3 100644
--- a/test/unit/include/test_common/packet_util.hpp
+++ b/test/unit/include/test_common/packet_util.hpp
@@ -56,6 +56,7 @@ inline std::string_view code_to_str(control_code_e code) {
 		case control_code_e::disconnect: return "DISCONNECT";
 		case control_code_e::pingreq: return "PINGREQ";
 		case control_code_e::pingresp: return "PINGRESP";
+		default: return "NO PACKET";
 	}
 	return "UNKNOWN";
 }
diff --git a/test/unit/include/test_common/test_service.hpp b/test/unit/include/test_common/test_service.hpp
index 1862134..5aa442c 100644
--- a/test/unit/include/test_common/test_service.hpp
+++ b/test/unit/include/test_common/test_service.hpp
@@ -51,19 +51,11 @@ public:
 	}
 
 	template <typename Prop>
-	decltype(auto) connack_prop(Prop p) {
-		return std::as_const(_test_props[p]);
+	const auto& connack_property(Prop p) const {
+		return _test_props[p];
 	}
 
-	template <typename Prop0, typename ...Props>
-	decltype(auto) connack_props(Prop0 p0, Props ...props) {
-		return std::make_tuple(
-			std::as_const(_test_props[p0]),
-			std::as_const(_test_props[props])...
-		);
-	}
-
-	const auto& connack_props() {
+	const auto& connack_properties() {
 		return _test_props;
 	}
 
diff --git a/test/unit/test/client_broker.cpp b/test/unit/test/client_broker.cpp
index e1d6cc7..1595be7 100644
--- a/test/unit/test/client_broker.cpp
+++ b/test/unit/test/client_broker.cpp
@@ -443,7 +443,6 @@ BOOST_AUTO_TEST_CASE(throttling) {
 
 	test::msg_exchange broker_side;
 	error_code success {};
-	error_code fail = asio::error::not_connected;
 
 	broker_side
 		.expect(connect)
@@ -546,7 +545,6 @@ BOOST_AUTO_TEST_CASE(cancel_multiple_ops) {
 
 	test::msg_exchange broker_side;
 	error_code success{};
-	error_code fail = asio::error::not_connected;
 
 	broker_side
 		.expect(connect)
diff --git a/test/unit/test/compilation_checks.cpp b/test/unit/test/compilation_checks.cpp
index 34f167e..46694b2 100644
--- a/test/unit/test/compilation_checks.cpp
+++ b/test/unit/test/compilation_checks.cpp
@@ -1,11 +1,16 @@
 #include <boost/test/unit_test.hpp>
 
+#include <string>
+#include <vector>
+
 #include <boost/asio/ip/tcp.hpp>
 #include <boost/asio/ssl/stream.hpp>
 #include <boost/asio/io_context.hpp>
 
 #include <boost/beast/websocket/stream.hpp>
 
+#include <boost/type_traits/remove_cv_ref.hpp>
+
 #include <async_mqtt5/detail/any_authenticator.hpp>
 #include <async_mqtt5/detail/async_traits.hpp>
 
@@ -43,7 +48,7 @@ class bad_authenticator {
 public:
 	bad_authenticator() = default;
 
-	void async_auth(std::string data) {}
+	void async_auth(std::string /* data */) {}
 
 	std::string_view method() const {
 		return "method";
@@ -93,9 +98,28 @@ BOOST_AUTO_TEST_CASE(client_functions) {
 	mqtt_client<tcp_layer> tcp_client(ioc, "");
 	tcp_client.authenticator(good_authenticator());
 
-	std::optional<std::string> data = tcp_client.connection_property(
-		prop::authentication_data
-	);
+	connack_props ca_props;
+	ca_props.visit([&tcp_client](const auto& p, auto&) -> bool {
+		using ptype = boost::remove_cv_ref_t<decltype(p)>;
+		prop::value_type_t<ptype::value> value = tcp_client.connack_property(p);
+		return true;
+	});
+
+	connack_props ret_ca_props = tcp_client.connack_properties();
+
+	connect_props co_props;
+	co_props[prop::maximum_packet_size] = 1234;
+	tcp_client.connect_properties(std::move(co_props));
+
+	tcp_client.connect_property(prop::session_expiry_interval, 40);
+	tcp_client.connect_property(prop::receive_maximum, int16_t(10123));
+	tcp_client.connect_property(prop::maximum_packet_size, 103);
+	tcp_client.connect_property(prop::topic_alias_maximum, uint16_t(12345));
+	tcp_client.connect_property(prop::request_response_information, uint8_t(1));
+	tcp_client.connect_property(prop::request_problem_information, uint8_t(0));
+	tcp_client.connect_property(prop::user_property, std::vector<std::string> { "prop", "prop" });
+	tcp_client.connect_property(prop::authentication_method, "method");
+	tcp_client.connect_property(prop::authentication_data, "data");
 
 	asio::ssl::context ctx(asio::ssl::context::tls_client);
 	mqtt_client<
diff --git a/test/unit/test/subscribe_op.cpp b/test/unit/test/subscribe_op.cpp
index ff777da..9edb8cf 100644
--- a/test/unit/test/subscribe_op.cpp
+++ b/test/unit/test/subscribe_op.cpp
@@ -55,7 +55,7 @@ BOOST_AUTO_TEST_CASE(test_wildcard_subscriptions_not_supported) {
 	auto svc_ptr = std::make_shared<client_service_type>(
 		ioc.get_executor(), std::move(props)
 	);
-	BOOST_ASSERT(svc_ptr->connack_prop(prop::wildcard_subscription_available) == 0);
+	BOOST_ASSERT(svc_ptr->connack_property(prop::wildcard_subscription_available) == 0);
 
 	for (const auto& topic: wildcard_topics) {
 		auto handler = [&handlers_called](error_code ec, auto, auto) {
@@ -87,7 +87,7 @@ BOOST_AUTO_TEST_CASE(test_shared_subscriptions_not_supported) {
 	auto svc_ptr = std::make_shared<client_service_type>(
 		ioc.get_executor(), std::move(props)
 	);
-	BOOST_ASSERT(svc_ptr->connack_prop(prop::shared_subscription_available) == 0);
+	BOOST_ASSERT(svc_ptr->connack_property(prop::shared_subscription_available) == 0);
 
 	auto handler = [&handlers_called](error_code ec, auto, auto) {
 		++handlers_called;
@@ -117,7 +117,7 @@ BOOST_AUTO_TEST_CASE(test_large_subscription_id) {
 	auto svc_ptr = std::make_shared<client_service_type>(
 		ioc.get_executor(), std::move(props)
 	);
-	BOOST_ASSERT(svc_ptr->connack_prop(prop::subscription_identifier_available) == 1);
+	BOOST_ASSERT(svc_ptr->connack_property(prop::subscription_identifier_available) == 1);
 
 	auto handler = [&handlers_called](error_code ec, auto, auto) {
 		++handlers_called;
@@ -150,7 +150,7 @@ BOOST_AUTO_TEST_CASE(test_subscription_ids_not_supported) {
 	auto svc_ptr = std::make_shared<client_service_type>(
 		ioc.get_executor(), std::move(props)
 	);
-	BOOST_ASSERT(svc_ptr->connack_prop(prop::subscription_identifier_available) == 0);
+	BOOST_ASSERT(svc_ptr->connack_property(prop::subscription_identifier_available) == 0);
 
 	auto handler = [&handlers_called](error_code ec, auto, auto) {
 		++handlers_called;