I bought this chair a year and a half ago and it looks and works as though it's brand new. It shows zero wear and it moves perfectly. I sit in it off and on for 8 hours a day 7 days a week. I have a really bad back and this chair is a God send. I love all of the pivot points and support. I alternate between resting my feet on a shelf and leaning back in the chair and sitting up straight with my feet on the ground. For reference I'm 5'7" and slender. It sounds like some of the taller guys don't find the chair to be as comfortable as I do. I have never found a more perfect chair. Should this chair ever break I will buy another one.
I'm 6'2" and the headrest digs into my shoulder blades unless I slouch. Otherwise it is a comfortable chair. I'll have to 3D print an extension to extend the headrest this otherwise great chair.
My son suggested I try Staples. I Was so pleased I recommended this chair to a friend. He bought it and is very satisfied. Supports my lower back perfectly.