I've been using a func pad for nearly 2 years now. Despite the surface is fading, and i'll be getting another shortly, the pad itself is excellent. Easy to clean, a decent amount of space, and it's 2 sided (smooth side/rough side). It has a rubber base. I've never had any trouble with it sliding around. The best part about the pad itself is, it's so easy to clean. I keep a tube of clorox wipes around my desk, so when it gets dirty I can just wipe it right off. The price is worth it for the length that you'll be using the pad.
$20.00 U.S
http://www.func.net