I have no questions about the build quality, it is assembled soundly. It is comfortable to sit, sometimes I spend many hours in a chair and do not get tired of it. There were no extra squeaks during use. My weight holds well, and I weigh 105 kg. The mechanisms are all working. Its pros: It is comfortable to sit in it, and this is the most important thing. Got cons: There is a slight backlash of the gas lift, but I have not seen a single chair without backlash.