This chair has very strange proportions. I am 6'4. The seat is short. The back is short. The arms are at the lowest adjustment but they are still too tall for me. The back does not adjust fully vertical so I find myself sitting straight up and not even touching the seat back except for the very bottom much of the time. Everything in the chair except the gas cylinder and the bracket on the bottom of the seat that houses the spring and adjustment mechanism is made of plastic. This makes me wonder how long it will last.
A decent general office chair but not great for ergonomics. Yes it is comfortable for those who it fits but it lacks many adjustable pieces which makes it uncomfortable for others especially anyone who is tall/large. The headrest is unusable for me even at it's highest setting. I will have to take it off entirely because it is constantly pressing against my shoulders. The arm rests move up and down but do not move forwards/backwards or out further to the sides. This makes the seat very narrow. The seat also does not adjust forward/backwards. Overall a decent chair that is comfortable enough to sit in but I am not convinced it is a good ergonomic option for full time use.
Assembly instructions were simple to follow the parts for assembly were well organized and sturdy. Chair has only been in use a few days. Ergonomically comfortable its durability remains to be tested.