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 have had this chair for several weeks. It is perfect for me. I can raise and lower the seat to the perfect height for whatever I'm doing. The back tilts as well and locks in place. If I'm watching a movie at my computer I can tip back put my feet up on a stool and relax. The mesh is not rigid. It feels like I'm sitting on a cushion. Yet the chair feels strong and well made. I expect it to last a long time.
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.