I can't speak for the longevity, however, I do love the way it looks, the material, and the amount/size of the pockets.  I did take off one star because it is just a tad (and by a tad, I mean like 1/4") too small for a 15" Mac book pro to fit in the padded sleeve.  There are a LOT of 15" laptops out there.  I wish the vendor would have just added that 1/4" to get it to fit properly.  Also, the pen pockets inside are too shallow/loose so my pens won't stay in those pockets.  A little frustrating, but oh well.  If they would have added just a bit of elastic it would cinch them together and make them work.

Other than that, the bottle pockets on the side are great.  The snaps so far have remained shut.  I love the included zipper bag.  For the price of the bag, I wish the company would look into these things, but overall, it's still a good bag.  I am using it for work, not school.