Steeldiver has very valid points about durability.
Another thing to keep in mind with any major brand name company is that they make multiple levels of quality and price for different markets. Most of us are probably familiar with Solingen, Germany Henkels knives (and Brazilian, Spainish, etc. Henkels). As I noted in my post above, there is difference in Camelbak sporting gear and their military line.
While a good company name, such as North Face, ensures you get a well thought and well designed product, there is no substitute for higher quality construction materials. I have seen North Face backpacks that belong at Wal-Mart on the discount rack and, of course we have all seen them the high end camping stores with the noticeable difference in price and materials of construction. There is not free ride - you either pay for quality or, you don't.
As a case in point, I bought a Lowe Alpine Special Expedition. This is huge pack (what was I thinking

) that cost $300 about 15 years ago. At the time it was made of what was a fairly new material, 1000 denier Cordura

. I discovered two things while carrying this pack for 6 months, with over 60% of my body weight in it, my knees would give out and, Cordura was the closet thing to flexible steel I had ever seen. After carrying this pack hard for 6 months, setting on rough concrete benches fully loaded, chucking it who knows where in overhead bins and luggage holds, it still looks like new with only minimal signs of wear.
Yes, that pack was darn expensive to someone who was scraping by working their way through college but, I still have that pack today. Buy the right one once or, buy an inferior pack many times after it fails you when you really need it. Walking across campus with a few books, a cheap Jansport is fine. If you broke a zipper or busted a seam, etc., would you be able to scoop up all the stuff you needed to hike out to civilization?