Microsoft Wireless Laser Mouse 7000 (2008)

Pros: It's rechargeable, so you can keep using it.

Cons: Can't support intense usage.
Batteries get low quickly
The surface needs to have contrast for it to work

Summary: I really dislike this mouse after using it for about 5 months now, it came with the wireless keyboard I got, wasn't cheap ... and after only a few months of usage the rubber on the scroll wheel lets go !
I've been using Logitech keyboard/mouse combinations for years but liked the look of the Microsoft keyboard ... I've been using an MX for two years now, and it still goes perfect ... I'll be replacing this entire set with a Logitech set now, sorry MicroSoft, this one just doesn't cope with 8 hours of working each day.