My chair recently started creaking a lot when I turn in it so I set it back to take a look and see if I needed to tighten anything. Slid down the telescopic cover for the base and under it was absolutely caked in a slick black substance. Avoid.
The chair is easy to assemble but I also meet the problem of not lying down due to the short distance between the back and the bottom of the chair. Make sure to leave some room between them.