I am so glad I did, this OS was made for the multi touch gestures and now I am really seeing how Apple is changing the way you interact with your computer. One thing I couldn't do without the multitouch which is just especially cool is the sliding to the previous page thing where it underlays the previous page under the current when you make the swiping gesture that represents the back button. That's just so cool! The pinch to zoom in Safari is pretty cool as well. Along with all the other gestures the trackpad had already supported under SL. I just wish there was a way to set a gesture to switch between tabs, that would speed up my daily workflow immensely.