Summary: Teflon on the bottom is stingy, and on some surfaces, I can feel the battery cover dragging.
Pros: Transceiver is very good, and works at long distances. Structurally durable enough to withstand multiple drops on linoleum floor. Tracking is accurate, and clicks retain a satisfying crispness.
Cons: With my first review, I was raving about the rubber that was used to trim the sides of the mouse and the surface of the scroll wheel. Since October, the rubber has turned to mush in my hand, and the adhesive is not holding it fast anymore. The rubber on the scroll wheel somehow got loose and obstructed the wheel's operation, so I had to tear it off.
Pros: -Battery compartment has a pull tab. Took Microsoft a very long time to add this feature. It makes removing the battery easier -Comfortable. It's large for a mobile mouse, which might be good or bad
Cons: -Jerky and unresponsive. Frequently gets jerky and freezes (old model 2000 wireless is much more responsive and reliable) -absolutely rubbish manual. Documentation is 3 pieces, in multiple languages. Only one page is actually about this mouse.
Pros: Quick response: when there is a good connection, it works very, very well. Overall, its a sensitive mouse that is well suited for various applications: gaming, etc.
Cons: The wireless signal device (aka the small input usb) apparently has a low signal strength. It will keep on slowing mouse movement/stalling it completely without a new battery. This unit requires 1 DoubleAA, that was suppose to last a while....I wish. Works very well at times, but when you need it, it tends to do make your life hell.