This part is very good and easy to program, but doing a little limited but ok in principle. Especially with us here, it was for an office, so the 5/2 separation was very good. The diagram confused, is also not entirely correct, but who can measure a clear advantage. Here with us it was installed in a vertical BR channel in the BR channel doses, so there was only the problem that the holes for the screws were just right and the left - useful would have been up and down, but that is whining to high level, now "fumble" for something he sits prima where it belongs and since then controls the heating very reliable and last (so the feeling) is the office no longer overheated or cooled. (Before the Analog thermostat was more like a light switch) Summary: Great, good - and highly recommended, I will buy again!
Suggestion: Maybe allow the 2nd threshold of the overheating value low and would be awesome "switch for over temperature" in order to, for example, turn on a ventilation system or air box can, so "If Raumtermperatur> 30 degrees, then ventilation for sucking in" - but that would be perhaps too much good :-)