Cons: As a previous reviewer said, it is losing it's finish where I grip it on the thumb area and ring/pinky finger area. The finish on the thumb area in specific can be easily scraped off, even with a finger nail. It doesn't really effect how you use the mouse, it just doesn't look that good. Thankfully, however, it isn't locking up as the aforementioned reviewer said. Though, I haven't had this mouse as long as him, so I sure hope nothing bad goes wrong.
Pros: The Sentinel Advance II is such an improvement over the SA I. It will do anything and everything I want it to in any game I play. From WoW to SWTOR to Skyrim. The buttons add a level of ease to my gaming experience, I am so glad I gave it a try. Thanks again Cooler Master and Newegg!