Pop off your old thermostat and install your new Nest Thermostat. It should take about half an hour. Now turn up the temperature and get comfortable.
You turn down the heat on your way to bed. Nest takes note and starts building your schedule. Cozy in the afternoon, cool at night. Check.
After you turned up the heat a few days in a row, Nest learned you like eating breakfast at 70º. So now it warms up the house as you get out of bed.
You’re off to work. The Nest Thermostat turns itself to Auto-Away to save energy after you’re gone. It uses built-in sensors and even your phone’s location.