Installation-wise, it is pretty straight forward except for getting the anchors into my drywall. There were two problems: the holes from my old thermostat were around the same location which meant I had to reuse them; and there was a piece of metal (presumably the metal box) on the inside which was probably less than an inch deep, so I had to shorten the anchors provided:
Once I got the anchors into the wall, installation was a 5 minute job:
How cool is this?
It is wifi enabled and it has a trackwheel interface (coincidence Tony Fadell?)