I've been looking for a sling/backpack that doesn't suck for a long time now. Let me just say that I'm VERY picky about my bags... so any little issue will get mentioned/bitched about where most people would just deal with it. But anyway, here's how I've stuffed it:
this is how you'd open it if using as a sling (unclip then just pull the top left corner in this pick and it VERY QUICKLY opens as shown:
unclip the bottom clip and unzip more for more access (you wouldn't do this while on your back):
keep going and you're to where the first shot was:
here's the top compartment:
notice it's got a rainfly and memory card holder in there. There's a small mesh compartment there as well as 2 side pockets. Lots of room for small things non photo related or even more lenses/gear.
the straps (notice the 2 red ones? That's to show you how to hook up the sling [red to red]. Backpack is as shown, you can sling either way, or you can criss cross [IBjumpjump], also notice how nicely the hip straps stuff/tuck away, the other straps if going with one sling also hide very well):
here's the back of the bag zipped up:
here's my first issue:
that's a closeup of one of the clips at the corner. You unclip one of those and pull to do the quick access sling deal which works very well. But see how they stitched OVER the zipper? not sure WHY they did it, but with it like that you can't fully open the entire back of the backpack one the ground (say to fully load it the first time and position dividers....). It's not the end of the world, but it's a bit curious. Obviously they don't want you to zip past the clip for whatever reason. One zipper with this stopper is more cost effective than stitching in 2 zippers, so that's why, but why shouldn't I be able to put my zippers wherever I want (if you go past here it makes it much more time consuming to open this flap).
also, check out this youtube clip as it really clears up how the quick access functions:
the girl in this one is hotter (the other one has a dude) but she talks way too much and doesn't show as much: