Glad to hear it's holding up! My own Logitech G500 has held up rather well... but the Microsoft mouse I got my father didn't even make a year, the rubber ring came off the wheel and it's not usable. Which is a shame as the rest of the mouse was still good as new. A simple solid-piece rubber wheel would've held up just fine and cost a few extra pennies during manufacturing, but now I have to warranty it.
Core i7 4770k 4.2Ghz
Crucial Ballistix Sport LP 1600MHz 32GB
EVGA GTX 480 HydroCopper FTW
ASUS Xonar DX
Corsair Neutron GTX 240GB | Windows 7 64-bit
Apogee XT + MCP655 & Thermochill Triple 140mm Radiator
Corsair AX1200 PSU | Cooler Master HAF-X