Two of my friends and myself own 13" Mac Air computers. All three of us love them. BUT one thing we all agree on is that they dent so easily you must be incredibly careful when you move them around. I keep mine in a well padded Abbi case designed just for my Air. My friends use equally good cases. The cases protect the Airs when being transported. The bad thing is that when you take them out of their protective cases and move them around while using them, even the slightest knock or tap will immediately result in a ding or dent. It doesn't affect the inner workings or operation unless you slam them around. Of course no one purposely does that. I know you can snap on a protective lid cover but that adds weight and slight bulk. And after all; the reason for the aluminum case is weight and bulk reduction. Catch 22! Just a pet peeve of mine! I had to vent somewhere and what better place than to post it on MacRumors here among friends. Thanks for listening.