The +: function side carpet gaming, fine large running surface, so no annoying little thick for edge, good responsiveness of the mouse above, pleasant The -: I regret white too messy, I do not expect a "tissue" area, I doubt that it holds well over time with repeated friction mouse and handle more weaving slightly Default tiny but very unpleasant when passing hand. In short a good carpet should be changed regularly, the next time I would go on a rigid surface like my former func is small but indestructible.