I bought this chair because it was comfortable when I sat on it in the store. The one sent to me had a tiny tear in the fabric on the side. I did not send it back. I was too far into the process of putting it together. The chair sits very comfortably. If I were to do it over again I would pay the extra $25 to have it assembled and pick it up at the store.
I've had this chair for roughly 4 months very comfortable BUT the piston has already failed. Chair will just fall within minutes of adjusting the height.