Here's my deal - I travel all the time, and somehow get stuck toting around say six inches worth of paper and a 6lb computer that my company's IT department swears is the lightest weight travelling laptop on the market.
Can you guess how often our email servers are down?
So anyhoo, I needed a bag that was both light and sturdy, and this bag definitely fit the bill. It's stylish enough to be appropriate in almost any business setting, tough as nails and weighs 1/3 what my black leather Coach bag did.
One minor complaint - before I figured out how to balance the weight in it for proper carrying, it did seem to slide off my shoulder a fair amount and feel generally unbalanced.
If I were an engineer, I would be able to tell you exactly how to load it, but I can say that my experience is that putting the computer in the handy laptop protection section while divinding the remaining weight equally between the other two main pockets does work well.