I came across this site marketing these bags as suitable Macbook bags - what do you think? Do you have/use a bag like this for your Macbook? Would it fit a 13" Macbook, power supply, cords, etc.? The published dimensions are 12"x14"x6", but I know that the only way to tell how WELL it would work is to see it in actual use. I've got a slipcase on my macbook so that I could just throw it into the bookbags and backpacks that I've got, but I'd also like a dedicated Macbook, and frankly have not been too pleased with my options, as the bags in my price range (<$50) frankly don't LOOK very interesting or good (I'm enough of a tool that those things actually matter). Just curious.