Doesnt that one require you to drill a hole in the desk?
Also it looks like if you want it perfectly centred you either have the monitor quite far forward, or have the desk away from the arm to compensate for the arm extending out.
Maybe im wrong.
edit*
Kind of cool. I looked at the manual and you can do it two ways. Standard clamp, or drill a hole the size of the thread. I like that option better. Might be interested in this one myself