I have informed me before buying long and finally decided on a product "Made in Germany" with TÜV / GS-evaluation. In fact, the chair was excellent introduction to two days after ordering with me and was after about 10 minutes without any major problems assembled precisely. The first impression as to condition / Quality was absolutely positive. Seat height and backrest angle can be adjusted on the right side each with a lever under the seat very easily and quickly. The height of the backrest, which is well shaped my view is adjusted by means of a rotary wheel also quickly as desired. The cover has a network structure made of fabric and is a matter of taste. I personally find it quite ok. After I can (180cm, 72 kg) have the chair to date about 3 weeks into use / I am sorry to confirm the reviews, which you slip on the seat forward, that I'm doing so well, and this is really annoying because I simply have no time for me to find comfortable seating position. I use the chair at home and therefore seats max. an hour a day on the chair and it is he just adapted. Eight hours a day to sit on this chair, which should be easily possible according to the manufacturer, I can not imagine. But this is entirely my own subjective opinion and if someone comfortably for long periods can sit in the chair, so it was granted him. Of course, one must also consider the price / performance factor and must for almost 90 vermtl. just do not expect too much. At least cracks and squeaks it anywhere on the chair, but as for the durability of the particular "seat cushion", so I can at that after 3 weeks of course make any statement. As for me, so I would not buy my chair again and can accordingly decided not Tell. Next time I will probably invest a few more euros.