The thing I don't like about it is that it is so open. If it's pouring down rain all your stuff in those side pockets will be wet. Plus if you fall down there is a good chance some of that stuff is going to get knocked out. My EDC backpack has zippers on all the pockets. Fairly waterproof already, but I've been thinking about scotchguarding it for further water resistance.

Got mine at Wally World for $28 and it is very comfortable & can carry 30 - 40 lbs of stuff very easily.