This is a well built chair and very ergonomic. The chair feels much expensive for the price and fits nicely. I am 150 and 5 9 and the head rest is perfect. The head rest has only 2 adjustments which does not increase the height so taller people may have a problem with that.
I bought this chair for my home office. I have been working from my home office for 3+ years. After sitting in this chair for 1 day I realized I have never had a properly fitted or ergonomic chairing all of the years I have been working a desk job.