It replaces my Razer Copperhead which began to date, but high-performance! this is my first logitech and I must say that design side, it smashes! What I like the +:
* The wheel Metal * Its design and its exemplary grip * The button to switch the mode dial and DPI mouse!
What I hate:
* This is the wheel a little hard notched mode.
Very good product, very beautiful finish and ergonomics with onions!