Initially somewhat resistant to these mice like "gaming" I finally succumbed to the appeal of this G 500 mice. This is a once in hand that you appreciate its ergonomics and the difference with the basic mouse first prize. The design is sober and modern addition to both. His greatest asset in my opinion is its dual scroll wheel mode. Indeed it allows either a typical use "notched" (ideal for switch between multiple selections) a "scroll" mode much more convenient when you want to browse a long document or website. The availability of these two modes is just great. After several months of use I simply can not do without this feature. The weights provided are also good although reserved for a public rather gamer. Finally a truly finished product which is difficult to do without after trying it!