Laptop Logic checked out a notebook bag, here's a short clip from their full review:

Advertised as the ultimate student or business backpack, the Tom Binh Brain Bag is designed to satisfy the needs of the most tech-centered person. Although the basic backpack has only a few features, it is designed to accommodate a slew of accessories customized for this particular bag. Accessories include the Monolith laptop slip which is able to "dock" with the Brain Bag, the Freudian Slip folder organizer, and the Snake Charmer accessory holder.



Link: LaptopLogic