Seems to work fine out of the box. It's one of the bigger mice I've owned; it's almost 5 inches long tip-to-tip and about 2.75 inches at its widest. It's a little heavy, which might either help keep your hand steady or slow you down, depending how you use it.
The pink color seems pretty close to the pictures, but it depends on your lighting.
The scroll wheel feels a bit stiff and heavy. The two side buttons seem kind of long at first, but you get used to them. The DPI buttons work, and the mouse flashes red to indicate what DPI level it's at.
Overall, seems like a good deal for $8.