It work. 
only negatives that i know of is that the screw hole covers don't really fit and tend to fall off. the cushion is pretty flat as well. on the plus side, the chair was easy to put together. the chairs pretty light and easy to move around.
a personal thing for me is that i wish it could go down lower, i have short legs and a low desk so there's little room in between. the lower back cushion is a little too low and its hard to keep my back straight.
all in all its a decent chair, but isn't worth 400 dollars.