very good price / quality, nice on hand (I have big hands ^^), perceived quality excellent, the only downside in my point of view "in game" (fps) difficult to master the use of 3 buttons inch side, you tend to click a haphazard in the heat of action and more back button is almost inaccessible unless you change its position for a decision with fingers !!! (I love playing with the palm on the mouse) while super mouse conclusion, but the best is the enemy of the good 2 buttons inches would suffice me, but now I use it in office and there it is perfect !!! ^^