Got the chair SO QUICK (less than a week) and was eager to set up my new chair!! However, it was missing a total of 4 parts. I only had the seat and the spider base- everything else (casters, gas lift, cover, base...) was not in the box. Currently working on the refund and will see in a couple days what the solution is. Just disappointed on wasting time figuring all this out and this chair is not cheap either!