Logitech Wireless Performance Mouse MX

Pros: -USB Charger
-Thumb Button
-Small Dongle
-Darkfield

Cons: -No more thumbwheel
-Back/Forward button placement
-Feels a bit cheaper than the Rev
-Loses ability to customize scroll wheel per application.

Summary: Frustrating. This adds everything that was lacking in the Revolution (i.e. Smaller dongle, USB charging as oppose to a dock, and Darkfield), but sadly this comes at the expense of many features that made the Rev great. (i.e. Thumbwheel, button placement, customizable scroll wheel per application)

The Perf buttons and frame also feels a bit cheaper than the Rev.

Maybe in a few years Logitech will combine the best of both mice, then I'll be in heaven.