Comfortable chair and seems to offer good ergonomic support so far. I have been able to sit on it for several hours at a time while working my desk job from home. It was pretty easy to assemble as well. It's also a great size for me (6' tall 190lbs). The mesh texture is somewhat abrasive on bare skin though (i.e. if I sit with my foot under me or wear shorts) and the head rest so far has been unnecessary.
I returned the Dexley chair as sitting in it made my left leg numb. Also the mesh fabric is very itchy: I had to put a beach towel on the chair just to sit in it while wearing a normal pocket T-shirt.
This model is an amazingly comfortable ergonomic chair for the money. I just wish it raised a little higher since I'm tall and like to sit high but other than that you will not be disappointed.
Comfortable Adjustable feels sturdy hinges and casters moove smoothly. I havent had it long enough to determine durability but early results are promising. Only gripe is lumbarsupport hasminimal adjustability and no locking mechanism so very long/short torso's might not fit well and it can shift over time.