There are several things that make the Ratpadz GS different. For starters it is a hard mouse pad made out of a high-tech polymer that is very difficult to break or warp. The UltraSlick ™ surface is just that, ultra slick and tough. There are also 9 polyurethane feet, that are countersunk into the base, that keep the Ratpadz GS from moving, even during the most furious of sessions in UT2003. To ensure the rigidity and stability of the pad, the base is ribbed, which makes for a solid construction, light weight, and low profile, only ¼”! Finally, there is the actual mousing area: 11.5” x 9.3”, which is huge! Great for when you are really getting into the game.