“This is a solidly and well-made TRV, it certain doesn't look or feel cheap. It's excellent value for money when compared with other smart TRVs on the market (some of which retail for more than double the cost of this one). Pairing with the Zigbee controller to get it onto my HA instance (via the Sonoff Zigbee USB dongle in my case) was very straightforward. I've had no trouble with it since: it seems to stay connected and just works. The downside is the temperature sensor: as soon as the radiator starts to get warm, the temperature it reports rapidly shoots up to far in excess of the actual room temperature. This isn't something that can be fixed by calibration; perhaps a future firmware update will address it? Either way, you'll want a separate temperature sensor in the same room as your TRV so you can trigger the TRV's behaviour using that. I've not done that yet, but it should be easily achieved in HA.”
