Love the style, but I have complaints. I've had the this for a few months and taken it on exactly three trips. The size is perfect for a personal item on most airlines and the straps provide plenty of options for attaching additional items. I carry it as a backpack when actually in transit, then put the shoulder strap on. I've barely used it in this messenger fashion, yet the hardware has already broken. Luckily, I always travel with a few caribeeners, so I just latched it on that way.
I believe they have fixed this in subsequent versions, but getting stuff into and out of this bag is a pain in the rear. it only opens a tiny bit on the main compartment and the accessory pocket is "protected" on the top by that little flap. But that means you can never just reach in and grab something. Plan on using this to get your stuff to wherever you're going and then unloading.