i would probably give this a 4.5 only cause of the price but i gave it a 5 just because the pack is pretty sweet!
i bought this primarily for my commute - fits my 13" macbook perfectly! for those of you who know the macbook pro's aren't light.. although i'm awaiting work to swap it out w/the air...
this pack is great..good & compact - lots of pockets, and it really does have more room than it appears. although my favorite feature (don't ask me why) is the retractable key ring on the inside of one of the pockets on the strap.
Overall, very satisfied w/the pack - good enough to carry to work as well as take on one of your weekend excursions!