I have my system up and running on Zigbee2MQTT. I have been having problems with ZHA and Conbee and also Sonoff Zigbee dongle for the last three months. I have a mix of Sonoff and Aqara sensors that while had been working well would just not stay up or even connect recently. I have a small house, a barn, a separate art studio building, and a chicken coop. It was driving me crazy. This was up and running and connecting to the farthest sensors and switches easily. Pairing everything was so much simpler. Now the test is whether will it stay up and running. (https://www.facebook.com/groups/HomeAssistant/posts/3361394887465191/?comment_id=3365725653698781&reply_comment_id=3367172610220752)