I will start out by saying I have one of the worst backs ever!! I needed to get some relief before my next shot and this was it. Now, I can just go hang upside (doesnt go all the way) down. The first time I got a bit of a head rush but the pay off was great. I went from being a hunched over granny to walking like Miss America. Pressure taken off of my discs and felt incredible. The material used to build this is great. I am very confident on it. Its very sturdy. Set up wasnt that bad although I did have my husband do it only because I dont trust myself!! The only downside is that if you are too tall.. you may bump your head. My husband is 6'4 I am 5'9. His head touched the floor when fully inverted. BTW, the chair doesnt invert 100% but its good enough to take the pressure off of my lumbar spline!!! All in all a great purchase!