What can I say; I bought the chair, because of the good review, but this I can hardly agree. On my chair, I noticed that the connection between the part wobbles with the gas spring and the seat and therefore the chair is constantly tilted slightly to the left or right. The rolls are the last joke! If the chair is loaded (I'm not much weighing), they become stuck, stop turning and you are forced to get up to the chair to make a difference. The promised by the manufacturer "Well padded" I can not confirm, after about 2 weeks, I use the chair, the metal angle of the seat part connects the rest of the pad was not realized, so that only with a pillow, a sitting it is possible. The rest is stretched too lax in my opinion, because you sink a little in it, and the bond that should prevent this from happening with me is not exactly tight. Therefore, I get to tagtäglichem prolonged sitting on increasingly stronger back pain. In addition, the armrests have another ridge on which arose during the welding together of the individual parts on.
Compared to my old chair, I have more from the IKEA 40 EUR, this is a nightmare here.
Hence my recommendation: Better a few euros more for a different chair from IKEA or elsewhere spend ago.