The Frag chuck is amazing, the mouse side is garbage 
What do you like about the chuk?
i dont have it but what i like is that is has 3 shoulder buttons instead of 2 like the sony nav
thats one additional button on the chuck that can be pressed WHILE using the analogstick
thats one key feature most nunchuck designers dont realize, shooters require a lot of actions to be used WHILE moving around
having just 2-3 of those buttons means that any other important action needs to be placed on the mouse which usually means you have way too many actions on the mouse