Ahhhh this is good! I have fibromyalgia and this has been wonderful to work on the back and neck. Hubby loves it too. I’ve got other Renpho products & very happy with their quality. The heat is nice and gentle but sufficient. The settings can be tweaked to work in a particular spot on the back. The neck part can be moved with the controller. I don’t particularly like the bottom massager bit, it feels more annoying than helpful, but that’s just me. We’ve set it up on an upright dining chair as the strap holds in place well. Easy to use & well worth it!