I absolutely love these stools. I purchased four of them and assembled them myself. Putting them together was rather straight forward, using the instructions. However, attaching the chair back wasn't easy because of the closeness of the pieces and the length of the wrench.  Enclosing a shorter wrench as well as including the longer one would have made it much easier. Also, once the chair back is attached, there is a gap at the center screw between the back and the cushion that doesn't completely close, I don't care how lone or how hard you try. That's the reason for the 4 rating.