I have had it for about 4 months and I received it as a Christmas gift. The chair has had problems since day 1, it creaks a lot. I applied wd40 to all its parts and it decided to creak inside the chair where I can't apply more wd40. It may be comfortable for some, but for many hours of gaming or video editing... Stay away!
Update after almost exactly 6 months of use. This morning the chair broke. I wanted to lean back and while I didn't go all the way, and not even with force, it broke and I fell backwards. I thought maybe a screw had come loose, but upon closer inspection, the chair had broken inside. I weigh a maximum of 65 kilograms, so I don't think my weight was the problem. I do not recommend this chair, find another one, or better yet, get an ergonomic chair that is better for your back and won't break in half a year.