If you care about your posture this chair does its job at its low price. It keeps your back straight. No slouching and you can rest your head comfortable. Great for young kids to teach them how to sit up straight for proper posture. My First chair with a mesh seat - hopefully it last for a long time. Great buy! Very satisfy. Staples shipping is ridiculously quick. Got it next day! It was nicely boxed and instructions were clear. Easy to setup. Takes 15 minutes.
The back support and ability to tilt back are wonderful! It is also my new chair for sitting at my sewing machine and allows me to sit upright rather than be a curled up blob in front of my machine. My only complaint is that being only 5'1" with short legs I would like the lowest setting to be a bit lower. I have a foot rest that I use as my feet don't fully touch the ground while seated causing stress to the sacral area of the back. Most if not all chairs have this issue.
It's cool and comfortable but won't lock into incremental positions. The headrest adjusts without any tools or inconvenience. The seat is adjustable to a wide height range from low to high.