Work well so I have no complaints about their functionality. Minor issues that prevent me from giving them a five-star rating include lack of precision in the temperature play (should go to tenths of a degree) and an indicator if active.
I have not had a problem after install. They set it up for me after I tried myself and had a complication, but it was something I was doing not the thermostat. I love being able to control it from my phone. Easy to use, too.
How can I adjust the temperature in different rooms? Ie, hot in the master bedroom and cold in children's bedrooms on the opposite side of the house. Is there an additional sensor I can purchase?