Great device-but awful directions
I have horrible neck, back, and jaw tension, so I was excited to try this. I read the directions and went to work.  However, it was awful. I started with the highest setting and it was not comfortable at all. I watched a few youtube videos and better understood how to use the product. While you are paying $40 for an adjustable piece of foam, it really does work to relieve the tension. Just do a little research first.
Rating: 3 stars