Quick and easy to program, are quiet and the batteries last a long time (have been 2 years in operation).
Nachwievor it is a mystery to me why div. Manufacturer normal simple Thermostats take a significant charge in another connection option. But that has hereby fulfilled.
Largest savings potential in newer heating systems can be achieved in rooms that are used only morgends and / or evening. For bathroom, hobby room etc.
Addendum: In December '13 and mounted Anfgang February already one of them with errors 'E3' defective (engine failure). So I have to I contact the manufacturer to hope for a speedy repair / replacement now.
2. Supplement: In February '15 and the 2nd controller broke. Again the engine. This has been a problem with the engine this made in China regulator is one thing, but it's a big hassle to get compensation is not justified. Amazon provides no post here, and the customer is put on yourself. Disappointing ...