For the fanatics of total control (like me), this thermostat teaches you to lose control.
He learned everything alone (or almost), your thermal preferences, your hours of presences, it is he who decides when to begin heating to the temperature at the desired time.
For people that do not have programmable thermostat or no thermostat worst of all, do not buy something else ...
Anyway, today I recommend it to all my family!
The 5th star at the end of the season when the result will constté on my gas bill :)