We have a Tado system, not the current generation but the one before. It was easy to self-install and configure and has never given us any trouble. There are a couple UX quirks, such as not having a confirm dialog after you touch the Shut Down All or Max Out the Heat buttons, but overall it’s one of the rare electronic gadgets that has led to no buyer’s remorse.
Anyone in Europe looking for an alternative might want to check out Tado
Netatmo as well if I recall
Or Drayton Wiser
Do they integrate with Home Assistant?
Yes
https://www.home-assistant.io/integrations/tado
You can also control locally (i.e. without internet connection) using homekit integration.
Been working fine for me for a couple of years.
We have a Tado system, not the current generation but the one before. It was easy to self-install and configure and has never given us any trouble. There are a couple UX quirks, such as not having a confirm dialog after you touch the Shut Down All or Max Out the Heat buttons, but overall it’s one of the rare electronic gadgets that has led to no buyer’s remorse.