This is by far the best looking mouse I've seen. It's not overly flashy and doesn't have distracting LEDs. As a matter of fact, the optical LED is hidden so well that once the mouse is on a surface, you can't tell if it's lit even with the lights off. The MX510 comes in either dark blue or dark red. The top has a very peculiar holographic effect which gives the impression of folded fabric beneath the seemingly clear surface. Because this is a random design, no two mice are the same. Even more interesting is the lack of buttons; the single top piece is so well built that you can click on the left side without ever disturbing the right. This gives the impression of two separate buttons, but better since your hand never leaves the surface.