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.
We have had 2 of these chairs now. You get what you pay for. The first chair starting falling apart quickly always tilted forward and eventually the actual METAL post connecting the seat to the base snapped and my child fell. We reported the results of that with photos and received a replacement part in July 2020. In March 2021 the chair was just unusable. I let my son talk me into buying another one of these because he prefers the fold up arms. Within a month the seat was flat and the surface of the seat started flaking off. Within the next few months the seat wobbled on the base and this week (May 2022) another metal part snapped and the seat back will no longer stay upright. My son is average size for his height well within the limits listed for the chair. He does use it several hours a day between school and gaming however the durability and safety of this chair is terrible.
The height of the chair is important to supporting my 6 ft 1 inch husband. He loves it; very comfortable. The ability to adjust the height of the chair is also a plus