So far so good, I have two of these in the house (of course one connected to each furnace) and so far they have been working well. One did pop out after installation causing it to go offline and requiring a trip to the house that is currently under rehab to make sure pipes didn't freeze.
The video step through instructions are incredible. Makes the installation super easy.
Installation was very easy following the app instructions. Only thing I don't like is the minimum difference between the "heat to" and "cool to" settings is 5 degrees. Would like a tighter comfort range.