I just bought and installed two of them. So far so good. Installed in 5 minutes, joined the network without issues, all good. I didn't try anything fancy, The Thermostat Scheduler seems to be able to control them and the built-in stuff seems fine after 3 days.
One device question - All programable thermostats I've ever had have an "auto" setting where I set the heat point and the cool point then the thermostat takes it from there. For example, I set it to 68* and 80* heat/cool and it does its thing. This device seems to have a heat and cool setting and no auto setting. I found something called "Auto-Changeover" but I am unclear how that does the same as the auto setting. Does anyone out there have any info on this?