This bag is a real beaut! It's definitely not a day-pack sort of backpack. This is luggage. It's built to hold a lot of stuff, and I keep finding new pockets and compartments each time I look at it.
The duffel/backpack comes vacuum packed really tightly. You have to hook the shoulder straps to the loops down below. There's a removable shoulder strap inside so you can carry it like a duffel if you choose.
The pack is really beautiful (I selected Navy blue), and the build quality is great. This would suffice for me if I were going on a trip of 1-2 weeks, as I try to pack light. If you're an economical packer, you could use this on a trip overseas in place of a traditional backpack.
External straps provide additional support and help keep things compact for overhead storage. This pack is a winner.