Got this thing a while back. It really does help with my chronic back pain. It is almost just as good as a similar machine my chiropractor would have me lay on after each adjustment. Between this, deadlifting, and stretching my back every morning, I have not had to go back to the chiropractor in a long time.
HoMedics Therapist Select Shiatsu Plus Massaging Cushion, SBM-300
http://www.walmart.com/catalog/product.do?product_id=4100502
