I'm currently using this to play DotA 2 – its a quick mouse, great for MOBA games, it is extremely accurate and there is definitely no delay what so ever when it come to tracking/clicking. I must say the buttons are extremely durable – they don't ‘stick’ like other mice I have used do. I can issue commands and click like a mad man with no trouble what so ever!
The programmable buttons are good – I tend to use my keyboard for my in game commands as that's what I'm used to. I do however use them when browsing the internet. I also have them hot keyed into slot 6 for my boots! :D
The on the fly DPI is handy, I don't usually use it too much but it's good to know it's there.
Shape is awesome I'm coming of using a RAT 9 and thought hat was the bee's knee's. Now that I've seen the light I can't go back – thing thing is a piece of art.
You won't regret this mouse, if you're a gamer and are ready to take it to the next level I recommend this combo'd with a good mouse pad! (The logitech one is good!) Thank me later ;)