I have a Banjobrothers standard 1,500 cubic inch commuter backpack. This thing only has 1 big open space pretty much (it does have a nice side pocket and wallet and keys space though. It is also nicely made). Its so deep though at 8 inches (not height or width...but from front to back) that when I pack it....even with smaller loads...all the weight gravitates to the bottom of the bag and sits on my lower back causing some pain. I'm looking to get a backpack that is about half as deep (also a tad taller and narrower) so the contents of the bag stack up higher and is more evenly distributed on my back. I have a 30 mile roundtrip 4 days a week. I cant reccomend this bag for longer commutes like this. The only reason I still have it is because sometimes my girlfriend picks me up from work, and I need the full space of the bag to pack full of clothes for the weekend etc.