The G602 from Logitech is perhaps the most... disruptive peripheral product I've seen in a while. This is for reasons that might not be immediately apparent....
Logitech G602 Wireless Gaming Mouse Unboxing & Overview
Logitech G602 Gaming Mouse - Review
Logitech G602 Wireless Gaming Mouse Unboxing
McTech: Logitech G602 Gaming Mouse Review!