Hello, I am very happy with this purchase, this is my second mouse games but my first Logitech, I had heard many echoes about their products. I hesitated between several mice there are so many, it was a great price and a beautiful aesthetic and now that I have in hand, she has a perfect ergonomics. Many options, software that allows any programmer, speed dpi, buttons, profiles, free roulette or notches. The quality is impressive for this price. And I struggled to adapt to a new mouse, the shape changes, the speed, quality. I also buy a carpet so much change, although it took me two weeks to get used to. I went from Trust Logitech and it has nothing to do. The price was obviously cheaper and it was fine but after 2 years it took to change. I'm not disappointed. Please it is superb!