I sit in this chair 6-8 hours a day and it is quite comfy. My only concern is the metal bracket that attaches the chair to the back is bent or the bolt holes are not aligned correctly and the back rest is slightly crooked.
My wife and I were amazed we could buy such a nice office chair so inexpensively! Especially one with leather or a very leather-like vinyl. It was easy to assemble and I find it very comfortable. However if you need extra lumbar support which I do not this is not the chair you want.