This mouse is above all an excellent value. Having owned and with several mouse logitech it holds up. Compared to the G500 that preceded the ergonomics are just as good (and yet that of the G500 is excellent), a little less noble materials but used intelligently (small grooves on the side effective against sweating and the grip. The sensitivity of the main keys is set properly (unlike too sensitive for my taste G500), the side it will (slightly less than the G500, but not hurt). In fact it lacks the detachable wheel (it is notched what is good for the game.) Many gamers function (change the dpi on the fly) or gadget (changing the color of the logo on the fly ... also indispensable!). Otherwise good glide (Teflon feet) and very tough braided wire means drivers (and it works well without the gain is small it is or not razer logitech drivers) Otherwise I do not look issue would throw stones at those who do not like I even say that they have good taste. After 2 months of intensive use, and it works perfectly I made her look particularly ...