The package arrived damaged and the back section on the chair had a 3 inch cut in the vinyl.  It was easier to put together watching the Youtube link verses reading instructions. 3 stars because of damage but this may be more the fault of delivery that manufacturer. But the cut in vinyl seems tobe manufacturer fault either not seen or I was sent a quality second or reject chair. Since the cut was hidden by arm side piece it was not worth the cost to send back. I would say that the first time I sat down in chair I ended up on the floor. Warning, sit cautiously until you get used to the chair on fresh new wheels and the adjustments for you are made. LOL