This chair seems to be well made and definitely well-liked judging by all of the previous high marks. I'm a 6'-0" / 203 lb man and it didn't suit me well. There's a lip in the front of the seat that's very uncomfortable across the back of my legs and the lumbar support is on the small side and not in the right spot for me. I'll be taking this one back to the store and test-sitting before choosing a different chair that I can handle for 8-plus hours a day. I wouldn't say there's anything wrong with the chair it's just not the one for me.
I love this chair. It is comfortable and versatile. It fits beautifully in my home office. The assembly was a bit awkward in that it was tricky to keep heavy parts of the chair in a good position while attaching other pieces to it. Also if you have an Allen wrench attachment for a socket drive it would prob be easier to use than the included Allen wrench. However these problems are solvable and the finished product is well worth it.