I’ve got a nest… looks very nice, and handy being able to turn it on and off from afar. The user interface is really nice (both in person and on the app)
The ‘learning’ part of it is pretty pointless for me. I know what temperatures I want and when, and I’ve programmed it as such.
It’s other main feature is its ability to learn how long it takes my house to heat up, taking in to account local weather and past heating times. Too early to tell how well this works, the heating has only been on a couple of times since it was installed at the beginning of summer.
Worth the money? Probably not. My central heating was being replaced, and they offered me a nest (coupled with my old dual circuit timer) for £15 more than a new combined thermostat and timer.
Dave