I had bought one of these chairs a few years ago but when I moved was not able to bring it with me. I bought a replacement a few months ago - find the chair overall very comfortable infinitely adjustable - only negative is that the fabric on the seat is more scratchy feeling than I remember my old one was.
I am very pleased with this chair. It is comfortable good looking and I like the ergonomic design. It swivels and rolls smoothly. It also looks good; like one of those expense chairs. My only issue is the chair is not tall enough to raise me up high enough to use my keyboard at the correct angle. (My wrists should be below my elbows.) My desk is too tall. I love the chair but now I need to replace the desk. My advice: When you buy a chair aside from sitting in it know how high the seat must be so your arms are at the correct angle for typing on a keyboard.