It's okay. Cheaper than a massage.
The Backnobber II is a little more wobbly than I'd expected (for the money), and it doesn't work so well on areas that you can't get a good hold on. It's good between my shoulder blades and, with some two-handed action, I can work areas where the Backnobber II is more prone to sliding away when I'm using one hand. I'm not in love with it--it feels like one of those gadgety things that would end up in the back of a drawer if it was small enough--but I'm trying to use it when I can, because (let's face it) it's better than nothing.
Rating: 4 stars