Summary: I have had one of these for at least 10 years. It lasts and lasts and I'm still using it regularly for outdoor adventure photography. The only negative (slight) is that my new D200 with battery grip barely fits the bag. Without the grip its a perfect fit. The bag is long enough that I can usually stuff another lens in the bottom. Great bag overall.
Summary: This is a well built and durable camera bag. I am using for an Olympus E-500 with the 14-45mm and 40-150mm stock lenses that came with my camera. If you are a little creative you can accommodate both lenses and some additional stuff inside the main compartment. It is a tight fit, but still very workable and relatively easy to get to everything. I have even managed to get a FL-36 external flash in there with the rest of the main equipment.
Summary: This bag works as advertised, very tough and rugged. I use it for an eos-3 with a 70-200mm F4L, and that is about the biggest and longest this bag can hold. There is some room in the front pockets, but none inside the main compartment, hardly enough for the camera's strap to fit in. With a smaller lens though this bag would be a lot more useful for carrying more gear in. All I need is space for film and a flash.
Summary: I've owned and abused one of these for many years and it's still going strong. It is regularly dragged up and down mountains, through hedgerows and across bogs. If I did ever manage to kill it, I'd go straight out and buy another. Great design, very well made. Mine currently carries a dSLR big old 80-200mm f2.8 and a 24-85mm, plus filters, hoods and other detritus that tends to accumulate in camera bags.
Pros: tough, well designed
Cons: can't see your feet when it's on chest harness
Summary: I bough this pack after owning a TLZ 1 which became to small for my D1 camera. The provided chest harness is really nice, I use it all the time while hiking or backcounty skiing here in Norway. I can squeeze in The Canon 20D with grip, 200mmL (in front puch without the hood) and 17-40 on the camera. With the 50 1.4 in the bottom. But that is a tight fit and I only do it when I have to. Also space for extra cards, battery and filters.
Summary: I bought this bag for its raincover and verstile carying options. With the chest harness, I use the bag when heading out into the backcountry. This keeps your camera easily accessible, protected from bumps and the rain, and saves you trouble from fumbling with your pack. With the shoulder strap, it is a great light weight carrying option. You can also get the optional waist belt if you need to go light and fast.