Great backpack! I've been using it daily for months now, in snow and rain, and it's held up incredibly well, and I can vouch for it being 100% water proof. I've taken it on an international trip too and it makes for a fantastic carry on because of how compact it is. It shows hardly any signs of wear and tear. It somehow helps my posture too; I'm 8 months pregnant now and I can walk with it for miles with no backache, but when I walk without it, I get a backache within minutes. I have 2 complaints: (1) it's a little too small for my needs (but that's not the backpack's fault, I overestimated the volume I guess), and (2) it won't stay upright when I set it down; it has to be propped up against something, which has been really annoying. That said, it's a terrific backpack and totally worth the money.