I just want to drop a note to those that are interested in this pack. I purchased this pack from Amazon back in April and it has been my main outdoor pack ever sense. It is very well built and offers plenty of storage with the outside pockets, leaving the main pack's 52 liters (M/L) for all the main stuff.
The frame consists of a single metal bar running down the middle of the pack that ties into the hip support. In addition the the bar, they stuck a hard plastic backing on the pack to aid with stiffness, which makes it ride nice. One minor negative is this pack doesn't breath as well as some of the others.
There are 4 main pouches on the outside, with the middle one having a ton of different storage pockets available. The two on either side of the pack are large enough to fit my fishing gear and water filter, even with a loaded pack, as they stick off the pack. These side pouches also have a pass behind area, allowing for tent poles, fishing rods, ice ax, or anything else along those lines to be stored out of the way. The top one is smaller than many are used to, but you are still able to throw a fair amount of things in there. In addition, there are 2 water bottle holders on either side under the side pouches.
This has been a fantastic pack for me and I highly recommend it to anyone looking for this size pack. I have about 10 trips, 20 nights, and 200 miles on this pack.