KDog3, have you seen one of these in person yet? I'm wondering how easy it is to get IDs out of the outside windows/pockets. I've got one ID card I always have to remove from any carrier when I come into my workplace--security has to physically handle the card (they often scan it), and many of my ID holders make this an awkward process. I could maybe put this in a cargo pants pocket or, for the days I don't wear cargo pants, maybe hook it to my belt with a pseudo-'biner of some kind (wouldn't probably carry it in my hip pocket, because even if it would fit I'd be worried about eventually curving the ID cards like my driver's license has been curved in my current wallet).
Hmm... I also have another set of ID cards I don't use as much; they're grouped on one of those clip on retractable cord holders which, because of the alligator clib, is a bit thick... I'll bet that mess of cards could go inside without making the whole thing too drastically thick.
Do wish they'd put dual zipper pulls on it, but that's a minor gripe.