Easy to install, app works well, quiet and efficient. BUT there appears to be a major design flaw - once the unit is cooling, some internal problem (per Windmill) messes the sensor up. It cools the room, but it keeps cooling and cooling, won't shut off unless I turn it off0, and meanwhile tells me the room is 65 (which would mean it shouldn't cool). No use having an app-controlled ac if you actually have to be in the room to make it work properly.