This chair fits me pretty well. I'm 6'2" and about 200 lb and I have a little room left for the width of the seat and plenty of room to the arm rests. The head rest doesn't go high enough to be very useful unless I am leaning back (my shoulder hit the bottom of the headrest if I sit up straight) but I rarely sit back while working so for me it's a minor issue. It rolls well and adjusts total height arm height lumbar support height and headrest height as needed.
Very comfortable chair due to seat material and doesn't get hard the longer you sit in it. Only thing we would wish for it is the chair back go forward towards the front of the seat just a bit more but don't feel it detracts from the chair's quality and value.
Assembly was easy used my own hex key to speed things along. Adjustability is as expected. Good airflow with the mesh. I swapped out wheels with bearing poly ones for easy of movement and quieter