I love this rucksack. The main compartment is massive, I have never had a problem when it comes to fitting everything in it (even when it's four binders, four textbooks, two bilingual dictionaries, my book and my lunch!), and the side pockets fit my water bottle perfectly. It is easily one of the most comfortable rucksacks I own, the shoulder straps are wonderfully soft and breathable, and the back panel fits me really well. My only problem with it, however, is that the back is very flat, so my back can get quite sweaty when walking for longer periods, which is why I keep this as my college/work/around town bag. As a college/work/around town bag however, it is hard to beat. When this one wears out (which, judging by the great build quality and first-rate materials won't be for a while), I'll invest in another.