Great chair for the price. I've had it for a week. Immediate relief for my back. Yes you get shin bang (just like your alpine ski boots) but ease into using this chair and let your body adjust. You don't have to sit in the same position all the time.I like the adjustments. I thought my initial setup was good but later found that by changing the angle of the shin pad it fit my anatomy better.Uhm, yeah they could have marked the pieces to make it a little easier to assemble. Just pay attention to how the angles of the chair are in the pictures. Also the counterbored holes. I used a drill and hex driver which made it less frustrating then using the little allen wrench they supply. Don't overtighten the fasteners. Some have complained about its sturdiness. So far it's fine for me.Quality of materials is OK. I'm starting to get some wrinkles in the fabric on the shin cushion. There are some gouges in one of the pieces of wood, but I don't see them now that it is assembled.For the price it's hard to beat.