I struggled with how to review this bag. On the one hand, I've loved both the size and comfort of it. I'm a college professor that walks/bikes to campus every day, and I needed something that I could use to transport a pretty hefty volume of grading to/from work.
For the first week, everything was great. Then, as I was walking up a flight of steps, the clip that connects the shoulder strap to the back sheared clean off. My case (laptop inside) went tumbling down a flight of stairs. I contacted the company and they were very nice about it and offered to repair/replace the bag. Unfortunately, they needed me to mail it back, and I can't afford to be without a case during the last few weeks of the semester. So, I jury-rigged a temporary fix and haven't sent it in yet.
A couple weeks later, I was crossing a multi-lane highway with my 5-year-old son when the other clip snapped right off, causing the bag to plop right in the middle of the road (again, with my laptop inside). I shudder to think what would have happened if I was riding my bike.
In both instances, the bag was not heavily loaded. I had my laptop, the power cable, some dry erase markers, and a hard cover textbook. Not exactly a monstrous load.
I think there is a serious design flaw with these bags, and I'm not the only one who has noticed. I was talking with a manager at the local Apple store and he mentioned that he's seen a number of people with the same problems that I've had.
Overall, I would not recommend this bag, especially with the price you pay. If you do buy it, go to Lowes and pick up some chain connectors to use when the clips snap off.