very good mouse does not have to blush before well-known identical products, ergonomic, good grip, adjustable weight, good brief, YES This is my first comment BUT after a few months of use, all chrome parts fade and flake off, all adjustable bolts rust (yes, true), the bottom of the mouse, despite a good carpet, offers the same observation, rust and peeling color, short, after a few months the pot to the roses is discovered, unlike CYBORG RAT, they are made of materials snazzy who do not resist time! you have been warned.