Anyone here tried the Kensington Pilotmouse optical pro?

[styrafoam]

I looked at one of these at compusa today and I really liked the shape and feel of the mouse in my hand. Pretty large with a rubber grip surface on the buttons and sides. It seemed like a good deal for $39 for a wireless mouse, the box claimed 800dpi resolution. The wired one is $33 from amazon, they didn't have it in store though. Anyone used one of these, specificly in games?