Great mouse
Its a tough device with good hand fitment and a reasonable price tag. Buy it if you have broken many mice before and it will probably not be broken for a while.
Its has a good weight and balance; The wheel is perfect although a bit noisy but its a tactile feel; The switches are firm yet not soft and also very tactile and bounce back instantly so you can mash the button at very fast speed.
The DIP is fairly low; For FPS or even RTS gaming you will have difficulty sometimes selecting/pointing with good accuracy but it has reasonable accuracy; The tracking sometimes goes crazy and jumps to one corner of the screen but it happens once every 24 hours of use (about 2-4 occurrences per week...