Just bought the wireless Magic Mouse, had the older mouse with the mini roller ball on top........ unbelievable! I had tried one at the Apple Store and wasn't sure I would like it, it's very thin, half the height of the old one. I was so wrong. This thing is so fast, the multi touch surface is ridiculous, how could I ever use a wheel again? The scroll feature can be set to momentum and it will scroll to the bottom of my itunes page with one quick swipe...... I have over 5,000 songs in itunes!!!! It even has a deep sleep feature that conserves battery life once it senses you have finished with it. If you have an Apple with blue tooth, get one today. If not, watch for the copies, I'm sure they will be clunky and unattractive but if they work half as well as this one, it will be a huge difference in your computing experience.