I bought this backpack for my studies, especially because it is big enough to put my laptop 16 "with its cover. And I did not need to force to make it fit or the transport apart! Otherwise, it is still quite nice, except for the straps that are a little wide for my taste, and the logo "freegun" taking up all of the straps is ugly. Las zippers do not necessarily slide very well, but that may be because it is new, I hope they are strong enough ... Well, except these little "flaws" I have nothing to blame him, seams have much air resistance. It is waterproof (plastic light blue on the inside and in the front pocket), which does not seem to be able to tear easily. In the large compartment there is a pocket of the back side as wide as the bag, roughly half high. Personally I do not use and it bothers me more than anything. There is also a pocket for mp3 with headphones output at the top in large compartment side of the back up I did not use but which has practical air. So, overall I'm happy with this purchase, either way it's hard to find something perfect!