This is a great chair overall feels comfortable to sit in. Overtime the arm rests have started to wear quite so and the head rest has been broken for months now from almost nothing. Using it will break it after only a month or two it seems.
I am 6 feet tall and the headrest hits me in the shoulders at highest position. Another problem is that you can only lock the tilt in two positions. One is too far forward and the other too far back for desktop work application. Seems well built but with VERY poor engineering
My wife is 5'9" and I'm 6' the chair's headrest hits both of our shoulders and we had to remove it. We crossed the deadline for return so couldn't return it. Was not expecting this much poor design for the chair which hits people's shoulders and causes you to crunch your shoulders. We removed the head-rest altogether and using the chair without it.