My husband bought one for me as an anniversary present.  I was not impressed because I knew he would not be willing to be the massager very often.  I was correct.  But once I figured out how to use it with a selection of pillows, we were off!  I had a nerve issue in the middle of my back and used it three times a day on that nerve bundle.  It was the only way to release the pain.  I use it every night before I turn out the lights.  I have had it for at least 15 years and started using it daily or more, nine years ago.  It has held up well.  Today I will order another one as a gift.  I do not know what I would do without it.