Everything USB published an in-depth review on the Logitech MX518.

Optical illusions are fascinating. What are really just a few dots of ink can effectively fool the mind's depth perception and color recognition, enough to make you look twice and try to feel what's actually there. The MX518 takes advantage of this art with its new faceplate. A dark metallic silver color appears to absorb light in different areas, giving off the appearance of very deep dents in the mouse itself. The Swiss-cheese-like 'holes' are very similar to the NASA photos of moon craters, or perhaps more like someone putting speed holes in a new car with a pickaxe. Whatever it looks like, it will definitely pull attention on store shelves with the see-through box it's packaged in.

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