I've got my whole house done with them. Approximately 45 switches and they're the older Zen26 and Zen27 models. All run through HA and all exposed to Google through Nabu Casa.

We've had to reset a switch here and there with a quick breaker flip, but all in all they are reliable and quick. Response to Google is quick. We had older Google mesh wifi and it was slower. Upgraded to TP-link Omada Switch and Access points and things have been great as far as response.

We've also got a few of the 4-in-1 sensors. They work well also. My one piece of advice here is make sure you try the location and are happy with it before you stick the sensor up with that double sided tape as it will put a hole in your drywall paper if you have to move it.