I bought a Macbook Air the first day it came out in 2008. It turned out to be the worst computer I've ever owned. After 4 repairs through massive over heating issues, and in one case the screen actually detaching from the computer, I've always said to everyone what a terrible computer it is....but that my next computer would be an Air, because of the lightness of it makes it impossible for me to want to use any other computer anymore. And so I just bought the latest Air and am pleased to say every single issue has been fixed. The heat issues were so severe on my last one that I couldn't do webcam chats for more than 5 minutes without horrible sound/video syncing issues, sometimes lagging up to a minute. I couldn't watch YouTube videos for more than 5 minutes without the computer slowing down horribly. And in the end it was so bad that I couldn't even type into Safari if I'd been using the computer for more than an hour without lag appearing in the keystrokes. All of this on a brand new, top-of-the-line computer with over 40GB HD space free and only the built in apps (and iWorks) ever running. I always hoped I would be a fluke, yet my girlfriends Air had almost identical issues. But looks like this time they've finally got it right, and this incredible machine has been better put together.