Great deal! Back support mesh for keeping cool adjustable arm rests leaning lock option .... yea started getting ads for a $800 chair after buying mine. This is by most everything I can tell very similar and for 1/5th the price (on sale). Maybe not for people over 240lbs though.
Overall I love this chair. The one downside as I saw in another review is that the mesh is a bit rough for bare skin. Two things I either can't figure out or are not as advertised: the arms go up and down but I don't see how they swivel; and the headrest is supposed to slide up and down but is either very stiff or doesn't slide. It moves on a pivot but I haven't been able to make it slide down.