We now have 3 of these and love every one of them. The fact that we can setup different schedules for each unit and control them all from a single app is a game changer. Installation and setup in the app was a breeze. The only minor negative I have is sometimes a unit will lose connection to our WiFi. It still operates and runs fine (and maintains the schedule) but you can't control it from the app when this happens. I've had to power it off, unplug the unit for 10 seconds then plug it back in and then it reconnects automatically. A minor annoyance. We have these in 3 bedrooms that are each about 130-150sq ft and these work very well. We sometimes have to turn them down because they heat so well!