I purchased this chair because of all of the wonderful reviews about the back support -- They were spot on !! It is very comfortable. Also I work in a warm environment and the mesh seat is much cooler than fabric or leather chair seats. Highly recommend.
I've had this chair at 2 different jobs. It is amazing! It is very comfortable and supportive. I have lower back pain and switching to this chair has help a great deal.
Once I bought a cushion to go on the seat I like the chair very much. Prior to adding the cushion (a covered memory foam cushion with a "non-skid" bottom) I found the mesh to be rather scratchy through my work dress pants.