Did the chair now since 2 weeks, the seat comfort, the structure (alone, no problem), the dimension of the screw, everything top. (Because I have very different botch assembled) The tilt function backwards is pleasantly firm, with me the backrest fits from the top and bottom, the chair feels stable and high quality. With my 1.87m / 135kg I've worn some 150-200 euros chairs, in which here I have a good feeling. Even the lowest seat height is quite enough for me ==> the damper can no longer slip through, it does not go deeper. And will break in which probably nothing, everything very very solid. The could therefore something last longer ......