It's okay, I guess it provides the support my back needs, although it's definitely not the magic cure it has been claimed to be. The strap that goes around the back of the chair is pretty cheesy and I expect it to fail any day now. It's the real week point in the system. An elastic strap is not the way to go, a wider sturdier belt that can be cinched tight would be much better..
Rating: [3 of 5 Stars!]