I purchased the Logitech LX7 Cordless Optical Mouse on a clearance sale this past January. It was reduced to $9.99 with an easy online rebate of 30.00 - at this price, I couldn't pass it up. The mouse we did use before this one was corded, with this new cordless mouse we were finally FREE!
The packaging for this mouse is awesome in that it allows you to see and test out the feel of the mouse without having to actually open it. The color I purchased was Midnight Blue Metallic. This mouse is compatible with both PCs and MACs and, comes with the USB and PS/2 connectors for the wireless mini-receiver. Battery life is up to 8 months with standby mode and there is even a power indicator on the mouse.
I found that the response time of this mouse is excellent. Also, the ergonomic design has relieved the soreness in my wrists that I was experiencing with old corded mouse.
This is one Mighty Mouse!