Review on Line Back Stretch Bench - Boost Your Endurance And Stamina by Eric Williamson

It works. It relieves pain. The ratchet lever is too high up and too close to the side of the machine that your wrist will be at a terribly unnatural angle to reach it. They bent the lever up at a 90 degree angle so you can't just slip a tube over it. I put a large box end wrench on the lever (I really need to bend the lever straight so I can get my wrench back) so the place I have to grasp is much lower and I don't have to bend my wrist like you were tryng to scratch your armpit on the same side. I can't recommend it as it comes out of the box, but if you are clever, you could make it work. It does provide relief.