I got this for christmas for my husband and he loves it! everyday he would sit on it for hours. It looks like a just the back of a chair and fits on any chair. My husband has been having lower back pain for a while now, and he says it feels much better after sitting on it, and i just wish i get to use it more! This is one of the strongest and most precise back massager i have used, you'll be surprised how strong it is just the first try.