I won the powerplay pad from a facebook competition and have zero complaints - they designed the mouse to work on the pad, and you can swap the top pad part with any of the ones logitech sells (so you can replace it when it wears out, or even use a different brand one as long as its not metal i guess)
The closest to a negative (other than the price) is that the lightspeed/RGB part of the pad sticks out and can potentially get in the way of some setups if the monitor stand is close to you, and it makes me very paranoid to transport it outside the original shipping box because i'm worried of snapping it off.
Heres an image so you can see how close it is to the legs of my monitor stand: