I bought this chair a few years ago. I use this chair 12-15 hours every day between WFH and gaming. While its a fantastic chair for most of the years i have started to get a sore back with the mesh fabric back with no back support. You can adjust the height of the back easily enough but I will look for something to support the back a bit better than relying on mesh. Other than the backrest, the seat cushion is medium/ hard firmness but has lasted the many years and 12+ hours use per day. The lift to make it taller / shorter did go after a few years and ive noticed the chair will sink after a few hours/ days or if i have sat on it too quickly it will sink. For the price its a good chair but looking at the other ranges of this brand I would look at something with back support, personally.

Decent chair, and easy to assemble. I've had it for a few months now. the back support is great, but I do have some issues with it. The seat drops ever so slightly of its own accord when you're sitting on it. So the pneumatic pump looses some of its pressure I guess. But the biggest annoyance is that the back drops when you lean against it, which is super annoying. I'm in half a mind to get rid of this chair because of this.

This chair is very uncomfortable and has zero back support as the back is not fixed