I work in Russia and it's awesome to be able to keep any eye on my HVAC system from the other side of the world....The app is simple and very user friendly. A breeze to set up.
Looks good, functional, controllable when not at home, and feels like it has the ability to assist in saving energy. Not that easy to reprogram when changing your internet.
Excellent thermostat which was advised by HVAC company. The only challenge is trying to have app workable on two devices, as spouse always asking me to modify instead of going to wall unit!