Had Tado for about 18 months. Got two thermostats and nine rad thermostats.
It’s pretty much set and forget, put it all together, asked them to make a zoning change to accommodate a thermostat and rad thermostat being in the same room.
Only issue I’ve had is about three times over winter, I’d wake up to a cold house. Apparently the internet bridge had lost connectivity to the Tado cloud, not the internet... my assumption is that there’s a daemon in the bridge that is crashing and it eventually restarts but it can take hours/days. When the cloud connectivity goes, you’re on manual. If I reset the bridge manually it comes straight back up.
Think you can work around this with home assistant and HomeKit but don’t have patience.