I have two macs. I installed Lion on one. Sort of a meh because of the way I use the machine. It is way dependent on gestures, which means it will not be installed on the other machine. Partly because it also means I will no longer be able to use any of my power pc software. The scroll bars have gone away, mostly. They only show up when you are scrolling. Even then, they are barely noticeable as they are medium grey on light grey. Gestures are not intuitive. I would even go so far as to say they are backwards. One huge positive is the machine is almost twice as fast. That might be an artifact of the fact that in order to install it I had to do a bunch of disc optimization. I don't like the new mail program. I like to filter by account. What is your experience?