A UA ausschalggebender reason that I chose this mouse was that the grid of the wheel for scrolling can be switched off. However, they will react - will egeal scrolled at what speed - often not. In other Logitech models with disconnectable grids this actually works very well.
Many issues are certain (usually differently colored and smooth) substrates. The mouse pointer is then times faster, then slower, etc.
These two criticisms I advise buying from decreasing. A computer mouse should (and can) react much better "following orders" of the user.
