Truly is a mouse built for gamers. I've used it for the past 3 years and honestly haven't been able to find a better mouse for everything and anything that I need.
The tough and rugged wired design, while still giving you maneuverability makes it so I never have to worry about a battery charge.
My favorite part is definitely the exchangeable side panels giving you the option of three different magnetic side panels, all with different programable button configurations, allowing you to set your mouse buttons to whatever you like.
This mouse has made my hardcore WoW experience so much easier allowing me easy access to key binds that can be difficult to get to giving so many more options for easier play. With very "clicky" and responsive buttons just surfing the web or opening applications it is satisfying to no end.
This mouse also has full customizable RGB lighting, which is wonderfully bright and vibrant for a mouse, with the Razer Chroma application. While the Chroma program leaves things to definitely be desired and has some issues it is definitely, by far, the most user friendly program I've used with programming of buttons and RGB settings.
It is surprisingly comfortable in your hand and keeps that pinky finger from rubbing all over your mousepad, which if you're like me, drives me up the wall. For the price and things that come with this mouse is a wonderful fit for all your needs from shooters to MMOs.
-LS