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.