Personally I hate these types of "gaming chairs" and for the money would recommend buying a used Stealcase Leap or a Herman Miller. If you want more info on the DX chairs there's a shop forum for company here in the UK called overclockers and they've sold thousands. Here are some of the user reviews on their forum.
i now know they expensive as fuck. i spend countless hours in my chair and think i dropped 150 tops. that was a few years back its nothing too crazy fancy but works fine for me. ill see if i cant find a link for it just cause i love this fucker