The only reason i'm giving this 4 stars instead of 5 is because the straps latch (the little thing that goes into the eyelet holes on the straps) is the opposite direction. They should point down but they point up. Not a big deal at all. I actually don't want to say this thing is awesome because then more people will buy it and I may see other people with it, which makes me a little less special in this world but it is. Very durable, very solid stitching, PLENTY of room but not huge. There are two more compartments under the main flap. I'm taking 5 classes (16 credits) this semester and this will hold all my books with no issues. It does sit kinda low on your back and the straps will not adjust enough to make it more comfortable for most people but after a few days  it felt comfortable just they way it was. I"m prior military and this is just like the duffle bag you get except in a backpack version.

Overall I would highly recommend this.  Great design and feel. Very durable