I'd recommend the octane 8 too. I'm 5'4" with a short body and it's fine for me.
Best feature for me are the pockets on the side strap, I can keep my camera in one and access it without taking the rucksack off. As mentioned, there's a pocket on either side of the waist band (not huge but big enough for cameras, wallets, phones, bike multitool etc, tissues), a zip pocket on the front, a mesh pocket on the front in expanded mode in addition to the main compartment and bladder compartment. Lots of bungees to make it nice and compact, but the section on the front means you can fit a bit more in it if you need to (I manage to use it for my work commute in the summer carrying spare clothes and shoes plus the usual).
Edit: The mesh straps are really nice and lightweight too