Summary: The software that came with the mouse was not compatible with Windows 7 (odd, since it is a Microsoft mouse!). I had to download the correct mouse driver from the Microsoft site. But the mouse itself is wonderful!
Pros: Accurate Tracking, Comfortable Design, Glides Smoothly, Works On Any Surface
Summary: Easy setup, although the drivers that come with the mouse aren't Windows 7 compatible (a download takes care of that). So far good battery life. Very smooth and accurate navigation. Only complaint is it's quite easy to accidentally activate the zoom feature.
Pros: Accurate Tracking, Comfortable Design, Fast Response, Glides Smoothly