Already during the opening came a bestial smell out of the box, I guess that was the imitation leather, but it was so extreme that the chair only once for 2 weeks at us in the hallway was to ventilate and even 2 month later, guests complained about the smell. Even as we sat on it smelled behind the clothes after the Chair, Real disgusting. He smells the way now still for it, but only if you go to about 10 cm with the nose. The lever for adjusting the stiffness of the spring is one day, just fell off my chair. It is made entirely of plastic and has a guide for a parent that is attached to the spring. This Führug is simply broken without my ever turned the spring. Seat sit way too hard, not suitable for longer The structure of the chair ran wide going straightforward, but you need to build, so you can connect the backrest to the chair, to keep one and one to screw it to the best 2 people, but is still a "gepfriemel". When building immediately fell on the cheap processing, I had the chair namely originally ordered, so I thought (due to the photos on Aamzon) of the foot is made of metal, but is made of plastic. The rollers which are mounted at the foot, are also not particularly well finished. And the left armrest must reach all the way back press or they fall down all the time, because the joint is loose. Now after 5 months use the lever broken, which is to ensure the upright postion of the chair, which was processed very loose and not good from the start, just has been so that I am the chair but not much used for 3 weeks I technically illness incapacitated and must stay at home and in this short time the lever is flat broke. So I thought I'll use the chair not I sent him immediately after the first defects back, but wanted to keep him as interim chair, but it can not be longer stand on this chair and I wanted to let him substituting it, but I overlooked that I bought it on Amazon Marketplace and he will not just be taken back. Had then the seller contacted, who has of course issued me no return label but wanted to first know what is broken, I had to create photos and is the end of it, I get a replacement part sent because yes warranty (at least the attacks), however, now I could notice that the seat does not detach from the gas spring. Thus, I will use force and one probably even make another part broken, I better fix it myself and then I'll get certainly not replaced. -> Stay away from this chair, even for little money there anyway better than these chairs here and so I bought one now. Must now live with the fact that I 100 (where I bought him he was still more expensive) have thrown out the window, does not make the same mistake and look around for a different product.