Great and most comfortable chair to sit in for 5 to 10 hours of work. I highly recommend it to anyone seeking comfort plus complete back and hip support.
I am 5'7" 170#. I have purchased two of these chairs. The first was about a year ago and I loved it immediately. Recently my wife said she was unhappy with her desk chair and asked to trade with me. She loved mine and I hated hers so I purchased this chair again. I'm in this chair 10-12 hours a day (I have no life :( and it's very comfortable. If you buy this chair do yourself a favor and get yourself a t-handle 1/8" hex driver. It will make assembly much easier than using the allen wrench they provide. One other thing... this isn't a $300 chair. It always seems to be "marked down" but I have not (and would not) pay $300 for this chair.
I absolutely love this chair! The material is light and breathable it reclines to multiple positions and the head rest is beyond comfortable and just where it needs to be.