I am very pleased with this smart thermostat. I have two homes. One is a city home and the other is a lake home. In the summer when I go to my lake home I am able to turn on the air conditioning on in advance of arrival. And of course turn up the air conditioning to 80° in my city home. This saves me a lot of money. If there is a power failure the retained temperature preset holds.
It is also nice to check on my homes by Wi-Fi to be confident that they are working as set. They always are. This is the best investment I could have made. Mike