I heard that the wow mouse was terribad.
Don't take that as a fact, but I'm sure the reviews were not too positive about it.
At least a while ago it was bad. Not too sure if they fixed it now, nor do I have the time to check it out.
I find having 2 extra buttons is really all I need. Two side buttons for shift and alt, and suddenly 1-4 is acctually 12 buttons right there, Q, E and F are 9 buttons, and I've got more buttons then spells I use. So any semi-special mouse works for me.
Of course your options always get better having more buttons on the mouse.
As for the OP's mouse, It definatly looks cool. Might take a while to figure out how to make it work well, but more power to you if you figure it out.
-Rebound