I purchased the Passport Sling when I saw the following advantages of its design: 1. Removable camera compartment
2. Extending internal spacing
3. Lots of out-of-bag storage space The removable camera compartment is smart. Not only does it allow you to convert the Passport Sling into a daily, non-camera-hosting bag, it also allows you to place the camera compartment in a different backpack should the need arise. I have gone on a few trips aboard, during which I just keep the compartment with my camera (and a small spare lens - More on this later) in the bottom of the backpack. Another smart design is the zipper that changes the size of the bag. Normally when I use the bag as a street bag, I take out the removable compartment and close the zipper in the front, keeping the bag small enough to not bump into things while large enough to hold my belongings (tablet and point-and-shoot, maybe a thin jacket rolled up). When I go on serious photoshooting trips, I unzip that size-controlling zipper, adding extra space beside the camera compartment for a wind shell or a large lens. Finally, the out-of-bag storage space. There are two thin pockets on the sides and one large pocket at one end of the bag, all accessible without having to zip the bag open. Great for maps, water bottles, keys, etc. Very convenient. The only problem I have is that the pockets are actually not fully sealed from each other, so smaller objects (keys, pens, etc) have a chance of sliding into another pocket, causing small surprises when one is in a rush. Now for the cons. The camera compartment is compact, with one single divider with limited customization. If you use a do-it-all lens with your camera (I started out with Nikon D300s with 18-200 VR), it's not too bad. However, if you have a system of lenses that include a large tele lens (Nikon's 80-200 f2.8D in my case), you won't be able to fit that into the compartment while still having your camera body (with a lens attached --- mine is the 28-70 f2.8) sitting in the compartment. My solution for this is to put a small prime wide lens in compartment along with my camera with lens, and extend the internal space (via the zipper) to fit the tele. Bad news here though. The Passport Sling only offers shock protection on your equipments within the camera compartment, so any equipment (especially lenses) you leave in the bag but outside that padded compartment is under the risk of eating the full shock from any kind of drop or bump. Additionally, if you are one of those photographers who uses your pro DSLR with the battery grip, it won't fit in here with lens attached. If I have to come up with another con, it would have to be that the long side of the bag (that side with the extension zipper) would not conform to your body too well if you have something stuff all the way too the top (again, that rolled up jacket or wind shell). Overall, it is a great bag without much to be desired. Unless you need to carry a full system of camera body and lenses (like me on some photoshooting runs), definitely get this bag for its superior value.