I just bought a logitech V270 mouse and the tracking is so fast that just moving it a little sends the mouse to the other side of the screen. I adjusted the slider in the mouse tracking speed preferences and other than the first setting which is way too slow everything else is way too fast. Doesn't seem to be a nice in-between? I didn't install any drivers just plugged it in. This is my first bluetooth peripheral, and also my first optical mouse. Always used a ball mouse, so maybe this is how mice are these days? I tried it on my Powermac and Macbook and it's way too fast on both. Maybe I just need to get used to the speed or can I slow it down a little somehow?