The chair is very comfortable, and not in just the traditionally cushy type of way, but it allows for me to sit for an extended period of time without feeling any sort of fatigue. So much so that I need to remind myself to stand up and stretch every once in awhile, which I never had to do before because the seats that I had owned always got more uncomfortable over time.

The lumbar support is also quite comfortable and allows me to sit in better posture if I wish, though admittedly the chair is a bit more comfortable without it. 

Assembly was an absolute breeze. The instructions were easy to follow and it explained every detail of what the chair's levers do. The one complaint I have is that when I received the chair the five-point legs had some cosmetic damage on them. It is still usable so I didn't want to go through the trouble of sending it back and waiting for a replacement. Overall, still very good!