I bought one of their mattress toppers for Burning Man figuring that it's much more efficient to chill a bed than chill a space. However, setting the thing up required an internet connection. By using my phone as a hotspot, I was just barely able to bridge the gap so the mattress would connect to the internet. But then it also required a Bluetooth connection from the same phone to the bed, to actually turn it on, and the bridging-the-gap location was just outside Bluetooth range. What a completely frustrating, overengineered piece of crap. How about a simple couple of buttons to set the temperature?