Because it scrolls both in y as well as in x direction. A lot of software supports more than one scroll direction. The magic mouse makes that a very natural swi

Because it scrolls both in y as well as in x direction. A lot of software supports more than one scroll direction. The magic mouse makes that a very natural swipe across the surface. With BTT, I can define all kind of guestures on the mouse (some of it can be defined with the MacOS settings, but BTT gives even more freedom). 1-4 finger clicks, 1-4 finger swipes, you name it. No other mouse offers this. For gamers, I probably wouldn't recommend the magic mouse, though I am fine with it for StarCraft. But for all other tasks, I just love it.