can't beat this for the price. My G502 mouse tracks perfectly on it, and it protects my desk from scratches. I also use it as a non slip matt when I'm building PC's. although I really SHOULD be using an antistatic mat.
The very edges of the mat have a silk/polyester stitching on it to add durability, but some may find it slightly uncomfortable. I cope with this by having the front of the mat hang slightly over the edge of my desk.