Someone I know got lion for their macbook and they hated it. It slowed down their computer and they couldn't figure out how to revert back to snow leopard. I have an imac and I'm wondering how well lion will run on it. Alot of new software is built for lion and I should probably upgrade but I don't want to be stuck with it if I don't like it. I got it for christmas 2010 so it's a relatively new machine.