This makes the 3rd one of these chairs that I have purchased for various desks in my home. I LOVE this chair. It is extremely comfortable for my body but I especially love that it can act like a rocking chair. My most creative thinking is done while rocking.
I consider myself average height (5' 10") and find the headrest digs into my shoulders. So uncomfortable that I have removed it. Disappointed in that aspect of the chair. The chair without the headrest feels "okay" so far. But not a product I would buy again.
Overall the chair is comfortable and well made. The assembly is very easy to do with thorough installation instruction. I usually seat on the chair somewhere between couple hours to five hours without getting up from a chair so it has to be comfortable. I would give 5 star if headrest is bit taller. I am 5'11" and when I seat upright position the bottom of headrest keeps rubbing against my shoulder so I have to lean little bit forward. Although I can adjust headrest it's limited to tilting mode not height of headrest.
The Hyken chair is comfortable for both men and women of various body types. The chair offers firm support breathability and key adjustments in the neck and arm rests to improve the comfort.