I absolutely love this backpack. I had been looking for a new backpack for over a year and could never bring myself to spend the money on one in case I didn't like it. I finally stumbled across this one and talked to a very helpful person who told me all about it. My biggest concern was it being spacious enough for all of my books. I'm in nursing school and have to tote around anywhere from 1 binder to 4 textbooks and 2 binders. This backpack carries it all and stays comfortable while doing it. I have to say it is absolutely amazing for all of my needs. On another awesome note, the waterpack pouch doubles as an awesome laptop sleeve that fits my 13" macbook pro perfectly and even leaves space. Just when you think it can't fit any more stuff, there is an outside pouch that stretches to hold my planner, drug book (which is pretty thick), and even a snack. And the side pouches stretch big enough to hold a nalgene. All in all this backpack rocks and I would suggest it to anybody. One last thing, I am an avid hiker and this pack doubles as a great daypack. Most importantly besides it keeping your back comfortable, it has this awesome foam layer that doesn't make your back sweat like normal bags. Once again, can't praise this pack enough. And I'm 5'5" and about 135 lbs. and it isn't bulky on me at all!!