So I have had 2 of these chairs now the first one broke after 2 years and the second after 1 year. This is a good chair if you rarely use it its very comfortable but if you are heavier or use it a lot don't get it.
It took over an hour to assemble. The back particularly where the screw holes are is wider than the space it is meant to occupy between the arms. Suffers from the usual horrible obsession of manufacturers with Allen wrenches. The majority of screws are located such that only half a turn at a time is possible. Everything is black making it quite difficult to line up the wrench. On the good side or so I thought the holes did line up. Perhaps not so well as I discovered after over an hour of struggling to finish assembly the seat is crooked. The left is 1 inch higher than the right.