Summary: This is a great product. is durable and good for almost all occasions. (hiking, tourists, beach, weddings, parties...). the backward flap I'm guessing is for it to be less accessible for looters.
Summary: I bought the smaller 160AW, but it can't fit all my gear. So I bought the 170AW as well. It is about 2" taller, otherwise it's exactly the same bag as the 160AW. I was able to fit the following items in the 170 AW. - D80 Body with 18-55mm lens attached (I can also fit it with my 55-200 lens attached, but it's real snug) - 55-200mm lens with hood removed and slide on the lens body reversed.
Summary: I used the camera bag on a weekend trip to New York City. It fits well over the shoulder and is comfortable to wear walking around the city all day. Since I didn't want to carry something too bulky or bring along another bag, I found it useful. I stored my Cannon Rebel with 2 lenses inside along with my wallet, guide book, cell phone, sunglasses, extra memory cards and other random stuff I wanted for the day.
Pros: Comfortable, Lightweight, Strong Construction, Well Padded
Summary: This is a great bag for the price. It suits perfectly my D80 with the 18-135 lens, extra batteries, and some other goodies. The rear opening bag can be a bit annoyng in some cases, but is helpfull when you are standing, cause nothing will come out the bag.
Summary: This is a fantastic bag by lowepro. It's a blend of high-capacity and quick access holster styles. I can easily fit my D70s with 18-200mm telephoto (attached) and my SB-800 flash into the bag. I at first thought the front flap was useless, but it actually exists to provide more waterproof coverage to the bag.
Summary: The large flap which covers the big outside pocket but NOT the main compartment is large and full of stiffeners but doesn't zip to even allow as much as some microfiber cleaning cloth. The unzippered neoprene side pocket is also only on one side. The front of the pocket compartment folds down and also opens from the bottom and is where the little raincoat for the bag is. It offers some extra cushioning of your memory cards and batteries, I suppose.
Summary: I recently purchased a Nikon D50 and needed a bag to put it in. I wanted one that had room for future expansion (additional lenses and possibly a flash). Currently I have the camera/18-70 lens, remote, charger and USB cable and there is plenty of room left for another larger lens like the 70-300. The all-weather cover is a bonus but I am somewhat puzzled as to the function of the big flap on the outside.