I'm in the midst of writing my doctoral dissertation and was tripping over myself carrying bags of books/notes/my laptop  to and from the library.  The reviews on this bag sold me and I am not disappointed.  I stuff this sucker full of books, binders, plugs/laptops, lunch, water bottle, glasses, wallet, phone and keys, and there is still a bit of room to spare.  It is well organized with four zippered compartments (ranging from small to large), wheels nicely and easily on pavement or grass, and looks like a backpack for adults as opposed to one a kid would bring to elementary school. Despite it's roominess, it fits easily on the front floor seat of my Honda Civic.

My own suggestions: make the handle about an inch longer (I'm 5'8" and it's fine, but another inch would help) and the cell phone pocket large enough for a smart phone.

Regardless these small upgrades, this is a great bag if you are an adult who needs to tote around a lot of weight.  Honestly, this has made my daily trek to the library a piece of cake.  Hats off to its designer(s).