HUGE PROBLEM with the Microsoft Sidewinder x5.
Wow now this is a really bad issue I encountered with the Microsoft Sidewinder x5. The rubber on the mouse wheel turned into goo, yes GOO! After a year or so of use the wheel went gummy and is now junk. Take this into mind when buying this mouse, if you're a gamer then you might run into wheel related issues dealing with this mouse. Microsoft if you're listening please use better rubber next time, you're too rich to use cheap rubber, better yet just ditch the rubber completely and leave it as plastic.