OK, at $30 it was worth a try, plus it was so easy for me to check it out on a Mac Pro (with multiple boot drives inside it). I tried Leo, and I'm mostly indifferent, except for a couple of deal-breakers, which make me want to go back to SL. None of the new features appeal to me (guess I'm stuck in my old ways), but the proverbial "straw that broke the camel's back" is the herky jerky scrolling I get on my Logitech MX Revolution (yes, I updated to the latest driver). The all-grey Finder didn't help either. The only thing that I love about Lion is the new Mail. I wish there was a way to port it back to SL. Is there? I might just try copying the "exec" and the library files to my SL boot drive, but I have a sneaking suspicion this will not work.