Ok so i'm thinking about getting a MBA 13" later this year (if Apple don't release a retina display model) and the main reason i'm going for the Air, is because of the battery life. I just wondered if Apples quoted 12 hours of battery life is accurate? Do you get 12 hours out of yours? Also what is your opinion on the portability of the 13" MBA? is it easy to carry around in a bag for university? what do you guys think?