I thought it was Broke
I received this and had a hard time Initially since I thought it would not turn on. I discovered you had to hold the button down to turn it on. It still seems to turn off Randomly so not sure what is up with  the Timer in it. Looking for a users manual. However, it works great when I am laying down and don't want to lay on my back. The weigh of it keeps it on my back mostly and it does heat up pretty well.
Rating: 4 stars