The assembly was much more difficult than it should have been because the allen screws provided had very shallow heads and the wrench would have worked better if it had had a T-handle. The chair itself is very nice comfortable and sturdy.
My word am I ever glad that I read these reviews. It made me convinced this was the chair for me. It's fantastically comfortable and such a relief for these aching muscles. Looks great feels great. I'd recommend it to anyone!