Pros: Size, hard surface
Cons: wear and tear on mouse feet, hard to clean
I really live how huge this thing is, I don't like to lift my mouse and even at 4k dpi I can sometimes use the whole of a smaller pad.
The surface makes my mouse glide like its on ice! I love the feel of the surface it makes it seem like its moving so much faster and smoother. I noticed a significant difference on BF3 alpha and other shooters when using this pad compared to no pad, and crappy free pad.
I read later that a hard surface pad can wear out your mouse feet faster then the soft pads, which makes sense but I really don't care since mouse feet are cheap and I haven't needed new ones in over 6 years.
Overall I say if the price is right go for this pad, I really like it and it comes in three different designs.