I have had this chair for several days now and feel this chair is tough to beat with all things considered. First the chair is very comfortable and all adjustments fit my 6' height. No problems with the headrest or lumbar support as others my height have noted. Second for the price the quality appears to be top notch. Third it was very easy to assemble and I did so even with a broken leg. Bottom line: I would buy again and would recommend this to my friends.
I concur with a couple of comments regarding the chair. For me (5'8") the headrest did not adjust up high enough and poked me in the shoulder blades if I leaned back into the chair. Also although having a chair with lumbar support is nice this chair's lumbar support protrudes too much and is not adjustable (at least not from what I could see). Lastly the chair did not adjust down enough for me to have my feet completely flat on the floor. I returned the chair due to these reasons and I wasn't too keen on the material on the seat.