Modern office desks come constructed in many different materials in this day and age but desks made of glass or with high-gloss veneers pose a real problem when it comes to mouse tracking. Optical mice just don't work on them without a mouse-pad. I hate mouse-pads.

Fantastic product but I have one small gripe. I have found the zoom button too close to the forward and back buttons which results in accidental use. Other than that I am very happy with the product!