We bought this chair to replace the old beaten up chair we had. The chair has nice cushioning and seems quite sturdy. I will say it is a little tall even on the lowest setting which might make it most comfortable for longer legged people.
We received the chair with a broken arm piece, it seems the factory machine broke it while packaging. Great Offer Stock is sending a replacement arm for us (they were helpful and courteous). I have to say I think I like it without the left arm, makes it more roomy when you want to kick up your feet and lounge while watching netflix.
Overall seems like a good chair though I would say that they should have added adjustable lumbar support (feels like some lumbar support but it's fixed).
You can adjust the back rest, seat cushion (to rock back and forth or stationary in any position/tilt), and the up and down height of the chair. As mentioned it is slightly higher than expected. Also, the arm rests are adjustable (up and down only). You can adjust the tension on the rocking motion of the chair as well.
It is comfortable and would recommend for anyone looking for a nice office chair.