I am using this for my Pathfinder book collection I take to game.  Yes, I still take the books.  And my fantastic friends who have every iDevice known to man still ask for my books because they are dorks.
But back to the backpack!  I love this thing- it has tons of room, tons of pockets, tons of space.  It can get a little squishy when I bring all the monster books.  However, picking it up, carrying it and lugging around probably 40 pounds of books is much better than my previous ancient JanSport bag.  Getting something from this century has it's perks eh?
About the only thing I don't like about it is all the interior pockets are hard to get to when you have 40 pounds of books inside the thing.  Someday I'll upgrade to a not-iDevice and be that guy asking for your books during a game!  But I'll still use this because I'll never use computer dice, and figures FTW!
And lastly, pew pew I'm a canoe!