I bought the chair to sit well on the desk. My expectations have been fully met. I bought an everyday office chair and have a feeling without much effort - quasi nebenher- to do something for my muscles. I feel sitting on the cushion of air to be very pleasant. The slight movements while sitting not interfere with the work, on the contrary, I find that sitting in front of entertaining. I opted for the apple green variant and would continue to do so again. The hue is not flashy but very fresh and dynamic. Particularly successful, I feel also the attached poster on the many exercises for the removable air cushions are described. The explanations seem to me very fit and well-founded. I have already made one or other exercise and must say that they have called me quite a bit. Overall, a great buy, absolutely agree with the price and performance.