Review (2/5): It worked the first time
The first time I used this I soaked it for almost 20 minutes. I heated it for 60 seconds, then 30 seconds increments and it worked ok. The second time I tried to use doing the same thing, it didn't work. It burst and the gel started leaking, it has become flat. I am a week and a half outside of my window of being able to return for a refund. Now it's just money lost.