Definitely check the box for all parts! The first chair I received was missing one bolt, and one washer. Also, the center the center hydraulic post was damaged. It would not rise with lever.
Received second chair, all parts were included this time. Chair is basically easy to assemble, arms are suprising heavy and sturdy. Wheels are surprisingly cheap for the price point of this chair. Even with mate wheels are loud and clumsy!
Chair is not comfortable for long days or nights in front of the computer. I would not want this chair as my work chair. Hours on this thing would not be productive. Gaming or School maybe, only for the fact your not going to fall asleep in this chair that's for sure.
Chair is perfect for home use, sturdy and looks nice! Great for short term daily use. The padding on chair is NOT plush.