I have been suffering with back problems for years now and during that time I have bought so many diferent things that say are the best for back related problems. I have bought TENS machines which didnt do much. I enjoy a good hard massage but my wife is not the strongest of woman and she gets tired massaging me after 5 minutes and she doesnt get deep as she is too weak.When I was looking for a new machine that would asist the misses I came across the HoMedics Therapist Select Quad-Action Percussion Massager With Infrared Heat. I am more then very pleased with this product it is a lot heavier then i thought it would be which is great as the misses only has to direct it around my back and not hold it on as the weight does that for her. Its the best massage machine i have ever had and anyone else that gets one I am sure will be thinking the same.