Unfortunately, I bought a chair without having made sample sit before. The revenge now. Mir is the backrest is not steep enough, I realize after half an hour the first back pain. In addition, the armrests are too high mounted. If I am to use the arm, I can use either the mouse and keyboard reasonable. I'd have to break my arms. So we try it with folded arms. Is also not merely when the arms have no bearing warps you feel the same all the muscles. Total bad design. I'm afraid the chair flies away immediately in a high arc, unless I have so ruined my health until then that I get no longer raised him One advantage is the thin padding of the seat yet seen Orthopedic rather positive