Uncomfortable from day one. Lumbar support is very uncomfortable unable to move it more than an inch up or down. Arm height is only adjustable up and now lower down. Seat is only cushioned/padded at the edge (under where you bend your knees) that styrofoam padding has been falling out since day one every day I have to push it into place. If I could still return this I 10000% would
I'm 5'9 with an athletic build of 200lbs. I've found that with sitting up straight in the chair has the headrest lower corners cutting into my shoulders. If you sit more relaxed it should be fine. I was able to put the head rest all the way up and back and it's mostly fine.
I chose this model because it was a slimmer fit than others on the Staples floor and it works well for my skinny carcass. So far so good tho its seat is a bit unforgiving compared to my last seat (tho not uncomfortable). Adjustments work well tho I haven't got the back as stiff as I'd like; it leans back ever so slightly. Overall a very good chair for a good price.
Like the all mesh seat back headrest for cool comfort & extended sitting. Somewhat stiff if wanting that kind of support. Adjustment knobs are not the best or easiest to use as compared to other chairs.