The material is ok for this price range and is not as sensitive as I had feared. With sharp-edged objects, of course, one should not get too close. However, the quality of workmanship is not good: The blue cover is not just sewn so that it is offset in the seat opposite the blue element of the backrest around 2 cm. The seams are in turn worked properly, protruding staples at the bottom was not my copy.
Overall, the chair, however, not one of the most stable and has an easy time to the left and right (forward and back is wanted by the tilt function). Fear that the part you do not have to collapse under a turn: D Therefore not overstate this point. It tarnishes only slightly the otherwise good overall impression.
In summary, I would give the chair the following scores:
Quality (material): 3/5 stars
Quality (processing): 2/5 stars
Seating comfort: 4/5 stars
Appearance: 4/5 stars
Price / Performance: 3.5 / 5 stars