I download Lion. Install it. Restart. And .... I get a screen saying I need to restart again. Numerous tries later I figure I'll try and hold the shift key down. That seems to kinda work. I get a progress bar and things seem to be loading. Now... there's a startup screen with three choices.... backup disk.... (??? I don't have a backup disk), and two other choices that don't match my startup drive. I pick one of em, and my customized desktop, the dock... all my applications and basically everything is gone. 2 of my hard drives won't even show up. The drive that's working won't let me access anything because I don't have the right 'privelages'.... even though it's my friggin computer.... Long story short.... my entire setup is gone and my computer is screwed until I can find a way to revert back to Snow Leopard. Advice: DON'T BUY IT!!!!