I've been using this big in Afghanistan for the past 7 months. I give this bag 4 stars and here's why.
Pros: Great quality build with quality material. I have not had one tear or rip in the fabric. The grab handles on the top and sides prove very applicable if you have to grab the bag and move out quickly. The side pockets are large enough to hold a large Nalgene bottle and the bottom pouch is large enough for any accessories you take with you.
There are plenty of pouches and room for me to keep everything I need for a 4-day trip, to include the Laptop computer I put in the main compartment. I am extremely pleased with this bag and expect it to last me years, even after this rotation to the 'Stan
Cons: The pull-tabs on the zippers break off. Easy enough to fix with some 550 cord or any other type of cord. Here's the reason I removed one star. The flap that covers the zippers for protection always, and I mean always gets in the way of the zipper and gets caught up in the zipper when I'm in a hurry. It is almost impossible to zip this thing up in a hurry. The design of the zipper flap sucks and is more of an irritation of mine than it is prohibiting the function of the bag.
I was looking for a bag to use for some disaster relief work. I am a Red Cross volunteer, Ham Radio operator (ARES member) and I generally like to be prepared for mother nature. We live in the area of Indiana that got hit by severe storms recently. My wife was running around the house trying to make a list of things we should have ready when the storm came. Luckily I already had everything on her list ready to go in this bag. Don't underestimate it's size. This bag is huge. Epically huge. In fact I'm 99% sure that the scene where Gandalf fights the Balrog was filmed in the main compartment. For fun one day I stuck my 45lb dog in the main compartment and strapped the bag to my back. I could barely tell the dog was there. If the bag is worn correctly and the straps adjusted to fit your own body, you won't feel the bag even if it's full of things. The MOLLE system makes for easy attachment of other pouches, bags, holsters and the like. I've shoved two first aid kids (one attached by MOLLE, another just store-bought and thrown into the main pouch with it's factory box), extra set of clothes, two handheld radios, batteries, few glow sticks, some emergency food rations, a 1" binder full of maps and other info, two 1L water bladders, three 15rd .40cal magazines, a bunch of odds and ends and still had about half the bag empty. It really is the largest bag I've encountered. If you're ever worried about a spare tent for a camping trip, just purchase this bag and crawl inside.