I bought the black chair; it looks nice with the desk and rolls easily on the plastic cover over the carpet.  It adjusted easily, and 'fit' comfortably.  Tilt and height adjustments work easily.   The chair required assembly.  The challenge was with the heavy parts.  Assembly followed the directions and all parts worked. The first box received weighed over 75 pounds, was damaged beyond use and replaced.   Recommended additional package design as the ONE person delivery has significant issues - OSHA and work practices for each phase of delivery, getting into a home, and removal from the box need to be considered to eliminate damaged product.