After unpacking, I realized that a part was damaged ... the bottom plastic cover of the role Sterns was broken. A little tip to all, where it again goes: Cancels your old office chair! The plastic panels are usually identical. Thus I was able to build the chair anyway.
However, this did not prove easy. From the poor assembly instructions aside, I expected a little more quality in terms of the images shown.
Convenient but the chair is already. And the design is also great.