I haven't used it enough yet to notice any difference. However, I do like to turn it on and place my feet on it after work. It feels wonderful! And since it doesn't run on batteries, I can use it as long as I want without having to worry about it going dead like the individual foot vibration massage things I bought a few years ago. Haven't tried it on my back yet, just my stomach, trying to get rid of my belly fat, lol, but only used it a couple times so far, so I'll have to update at a later time