&gt; Why make things more complicated than they need to be?<p>My energy bills dropped about 30% with the Nest.<p>It does a number of neat things to save money, including running the AC fan through the chilled ducts for a period of time after stopping the active cooling.<p>For a forgetful person like me, it&#x27;s also very handy to be able to turn the house into vacation mode the day after I left for vacation.