I’ve bought this house about 14 months ago. About 12 months ago I installed the Ecobee3 and sensors in each room. I cant say for sure that it saved me a whole lot as those two months were mild late spring early summer. I can say this. My apartment I moved out of, was built in 1990 I think and was 800sq/ft. I kept it about 70ish in there, and my elect bill in the summer was $175 or so, ±20 bucks. This house was built in 2007 and is 2200sq/ft. My elect bill in the summer is about $150, ±10 bucks.
I value my comfort over the savings, but at the same time I dont want to spend a whole lot. So I’ve kept the house set somewhere around 71-73 this summer. Its been more days over 90 than we ever had, high humidity with ‘real feel’ every day over 100. So yea its done its job.
I do let it do all its fancy things. It is pretty darn smart. Only time I kinda scoff at it is on Friday’s when I work from home. It sometimes takes about an hour to realize I’m still here and stay in ‘temporary at home’. I dont like messing with it and overriding the setting just because I have forgot to undo that and left it set for a day or more. I dont try to be super controlling over it but I like watching the numbers. It might take a while for it to go into away mode when I leave but at the same time, I dont want it switching over and over when I just run down to Krogers and back.
I dont have it tied into ST at all. It does its job very well and I’m happy with it. Id rather it just be a t-stat than anything else. I can get temp readings from numerous other sensors in my ST network so I dont care about that. I dont change the temp like ever. Maybe once a season, like when we had 95* days for weeks I upped the temp a degree just to keep it from trying to cool for hours on end. But it is smart and like my house is the right temp when I get home from work, cooler when I sleep, and warmer in the mornings.
We dont have smart billing here so no benefits for cooling based on time, which sucks. I’m not sure of any rebates, but they will give you 5 compact florescence bulbs meh. So I got my ecobee just for comfort… with some savings as an added benefit. I’ve preached them to everyone I can as they are super nice to have. If you want to integrate the ecobee will do that, if you want alexa control it will do that, if you want to just set it and forget it it will do that