Early start for radiators
I tried early start in normal rooms with radiators and found the early start begins excessively early (like 4 hours!) and was advised this feature can only be used for very slow systems like underfloor heating. Pity it cannot learn over time how long it takes to heat the room, take outside temperature into account, and start slightly early (like 20 minutes) to hit the correct temperature at the correct time. The instructions imply it already does this but 2 separate support/help chat people have told me it does not.