Topstar is in every respect

The stool is a real gem and met all my expectations. The technique works very well, all the functions are to be used and make the movable sitting a pleasure. The assembly would be done in two minutes, if it were not a) there was a totally unclear assembly instructions and b) would insert two extremely stiff brackets. In the latter case, I have helped me in the following manner: the seat clamp with attached black plastic sleeve between your knees, push the clamps with pliers into the fixing hole and then just pure thunder, if necessary gently with a hammer. I have complained to the manufacturer. Topstar has also communicated to me on request, that the air pressure should be adjusted according to the sitting experience (how do you even know when a particular pressure is reached?) But always so that the valve does not touch the ground. My advice is, the higher air pressure (as delivered) to start and EVLT. later let off some air. This is the sitting and moving then 'sporty'. Also: Do ​​not place the stool on a light carpet, the tire turns somewhat.
I can only confirm that this is a good product at a very advantageous price.