I recently decided to expand my smart home setup by integrating several Zigbee devices, and I must say, the experience has been quite smooth! 
Starting with the Hama 00176593 Thermostat, I was initially concerned about compatibility issues, especially since I’m using Zigbee2MQTT. However, after some research and tweaking, I managed to get it working seamlessly with my Home Assistant setup. The ability to control the thermostat via Lovelace cards has been a game-changer for me. The initial script I set up to adjust temperatures upon restart worked perfectly, but I noticed that after some time, the thermostats would reset to 16°C. This was a bit puzzling, but by adjusting the MQTT configurations and ensuring the retain flag was set correctly, I resolved the issue. 
Another highlight was setting up my Shelly Plus 2 PM for rolladen control. The installation was straightforward, and the device’s ability to integrate with my existing system was impressive. However, I encountered a minor hiccup with the power consumption display, which occasionally showed 0W. After a factory reset and reconfiguration, this issue was temporarily resolved. It’s clear that with a bit of patience and troubleshooting, these devices can perform exceptionally well. 
For those looking to integrate multiple Zigbee devices, I highly recommend checking out the Community Hass.io Add-on: AppDaemon2. It has been instrumental in enhancing my automation capabilities. The support from the community is phenomenal, and the documentation is thorough, making it accessible even for newcomers. 
If anyone has tips on optimizing MQTT configurations for thermostats or insights into resolving power display issues on Shelly devices, I’d love to hear them! Let’s continue to explore and enhance our smart home setups together. Happy integrating! 