Very good mouse, designed for small / medium hand. Precise movement. The location of the side buttons however lack of ergonomics, but we made it. Using the nice and quiet roulette. Also nice coating but "mark" a little. To benefit from its full functionality, fully configurable, you need to install the driver on the download site Roccat. Then the device effectively combines the features of Windows drivers for basic uses, and those of the Roccat drivers for further settings, including creation of multiple profiles. Among other things, because the list is long, IPR setting and sample rate USB. + Small but not essential, trophy system. The software is in English, but annotation system in 17 languages, including French, by passing the cursor over the text. In short, given its price and extended functionality, mouse recommended.