This is the most comfortable office chair I've owned, as a fairly average sized person.The build process was very simple and honestly fun. All of the steps are printed on a single page, with all of the parts clearly labeled, and all screws packaged in their own little containers. It took me about 25 minutes solo with absolutely no issues.The material is very firm, but also soft. It conforms to my body and retains the shape like a really heavy memory foam.The back adjustment can be locked at pretty much any point, and while locked, it can still move slightly, making it not feel too constricting or rigid.If I had to pick any negatives about this chair, I think it would be the arm rests and the head rest. The arm rests cannot be adjusted at all, but are at a good spot by default. I do wish they were a little further back, but this is a very minor complaint. The head rest is the only part of this chair that feels a little bit cheaply made. I do think it will be the first point of failure, but it's still very comfortable and can be adjusted with rotation, up and down movement, and forwards and backwards.Overall, this is the most comfortable chair I've owned. The price is high, but it absolutely matches in comfort, durability, and design quality. I'm a very happy programmer with less back and neck pain already.