My son and I both got this chair over a year ago. He is 5'11" and I am 5'6". Neither one of us is heavy. Chair seemed OK at first but when used for long stretches of time the edge of the seat presses into the calf of the leg. That can be quite sore. If you expect to spend long periods of time in the chair consider a different choice..
The actual seat is very comfortable and I really like it. The back is not quite tall enough and the headrest is AWFUL. Like so bad. So hard to get installed right (the angle is like woah so awkward) and it barely moves and pushes your neck forward. Love everything except the head rest and wish the back was about 3 inches taller.