First, they made the shipping label really fast and sent you the tracking number. On the day it was supposed to be delivered, it was still not shipped. After I called the, they shipped next day.
When I received the chair, everything was wrapped nicely, but after I open the package, the piston, the important piece that connects the base and seat was used! There are obvious tears and wears. So they asked me to take pictures to prove them it is indeed a used piece.
They made a new label to ship the piston replacement, but it was's shipped.
They refused to give an explaination why a used piece was sent out. It seems to me it is not a mistake.