Pros It's as good as what you've already visualized in your head. Rubber top keeps it in place, and the pull out mouse pad is a nice touch. Nothing to plug in, no mechanical parts to fail like a chill mat.
Cons Some heat gets through after a while, but definitely not as if it were on your lap. The pull out mouse pad is just hard plastic; it serves its purpose, but a little bit of that mousepad-y cloth would have made this product that much classier.
Summary I got it on sale for twenty, any more than that would be silly though. Perfect alternative to a chill mat or any other bulky product.