The nest is absolutely the worst piece of technology I've ever had. I absolutely hate it. It's always going to eco mode no matter if I deactivate it or not. Get used to 82 degrees every time you come home because thats what it loves to do. I'm not sure how eco friendly it is because it takes 4 plus hours of cooling to bring it back to a decent temperature which Jack's up your bill because your always having to cool your house down from 82 every time you walk in the door or hell at 2am even. Don't get one. They are trash. Run far away.