To assemble the seat you need 4 larger diameter screws and 8 smaller screws. I received 5 larger screws and 7 smaller screws. To complete the assembly I had to go to the hardware store to get a replacement smaller screw (M6 x 1.00 x 25 mm). Otherwise the assembly was fairly easy. I like the ability to raise the arm rests.
This was to be my wife's new chair and even though she sat in one at our local store turns out she war very uncomfortable in a short sit once given to her on Christmas day. Looking to trade it in.