I've been using it for roughly 5 years so it's probably an old version but it does exactly what it says it does. Ie. It's a water regulated mattress pad with a thermostat so it stays at whatever temperature you set. I have to clean it out now and then with hydrogen peroxide and add water every month or so. The heater stopped working at some point a few years ago, but I never need heat anyway and the cooling system works fine. I also set the cooling system well above my bed and that helps the circulation. But it was like $600 or something. I usually set it somewhere in the 60s and I'm in my happy place.