When I first reviewed this chair I read about the headrest discomfort for tall people. I am 5'11" and ran into the problem of the headrest hitting your shoulders when seated. I ran out to Lowe's and bought some Flat Washers 3/8" put 4 on each side between the chair back and the headrest. I think you will like the results!!
The chair was easy to assemble screws in sequential pouches that matched the instructions. As many others have stated the ability to adjust the height of the headrest would have made the chair a 5. I am about 6 feet and have to slouch a bit to be able to put the headrest in a comfortable position. That of course negates the use of the lumbar support since my back is not resting against the back of the chair. The headrest can be removed not not installed so you may be able to find a cheaper chair without that feature that is made of mesh.
I’m a senior citizen with physical issues and too many Zoom meetings! I was desperate and am so happy that I bought this chair! The headrest and ergonomic design are excellent! However I may never have looked at a mesh chair or one with a headrest didn’t think I needed it but thank you to my tag team salesmen I AM DELIGHTED