How you liking those Nest stats?
I have 2 out of 4 zones in my house done. It took me buying 3 to get 2 good ones so that was a little disappointing. Until I upgraded my network to the latest wireless standard, I could only get one of the 2 linked up on WiFi despite great signal strength. You need to get them connected because the software they are shipped with is woefully behind the latest revision.
I would say that I like the concept but not sure I am all that impressed with the root engineering behind them, lots of bugs that they are still addressing with the firmware. The Lithium Ion battery charging is a bit sketchy, they will drop WiFi if they sense the battery voltage isn't quite high enough. They drop it to shed load and to conserve battery which is a good thing.
They work fine and once you get them networked they are easy to manage from a remote computer. I like that aspect of them and is the primary driver for why I purchased them (and it was easy for the wife to understand, she likes the on-off type of things).
They are hippie crunchy meaning that the company shows obvious animosity to Internet Explorer. I do not like that aspect of it. They seem to be Google/Apple centric. I am not a Google person because they know too much about everything these days and I refuse to feed into that.
Well enough about all that, the Nests are more than adequate. They are in Gen2 right now. I am hoping that Gen3 will be better yet.