If you are over 5' 6" I would keep on scrolling. I'm just over 5' 11" and the headrest is unusable. Hits me right square in the shoulder blades. Also the lumbar support is too low and can only be adjusted an inch or two. I'm going to return it. That's what I get for buying a chair online.
I am a computer programmer that sits in my chair 10+ hrs. After reading several reviews and seeing there were over 9k and the chair was rated 4.5 stars I decided to give it a try. i sat in it no more than 5 minutes and was so uncomfortable I went back to my old chair and had instant buyers remorse. The padding on the front cuts the circulation off to my legs. The lumbar support is horrible and there no way to get around that. I'm 5' 7" and 165lbs and this chair feel like it was made for a middle schooler. Save your money and find something else IMO.