Got my backpack.

Big kudos to ProViz for quick shipping.

Pros: Nice and bright. The battery pack is removable if you don't want to lug around the electric light patch. The patch is also removable separately from its battery pack. Comfortable shoulder straps. Roomy pack.

Cons: The sternum strap ... seriously? I'm a 34-small-b and the strap doesn't even come close to buckling across my chest. This pack is unisex if the one sex is male. The fabric is very lightweight so I'm not convinced of durability. We'll see.