If your mouse is ever laggy or skips, then it might not be an issue with the mouse itself, it could be the USB port that you have it plugged into.

It appears that there may be a compatibility issue between some iterations of Apple mice and certain portable models. MacFixIt reader J. Strauss writes "I have an iBook 12" dual USB, and a Titanium ...

Whether it's opening apps, scrolling through a web page, playing our favorite video games, or selecting a bunch of items on the screen, a perfectly functional mouse does it all — unless it stops ...