I was concerned that my hot tub was driving up my electricity costs, and this concern led me to purchase Sense. I had previously quit using the hot tub and drained it, which led to any number of problems when it froze during the winter. I spent several hundred dollars replacing parts to get it back up and running, and now that Sense has found it I see that it actually wasn’t costing me that much money after all! I’m now using (and enjoying!) the hot tub without worrying about excessive cost, and I’m seeking out the real energy hogs in the house.