I bought my bag about six months ago. Since then I have had it on a two week trip to Sri Lanka and a six week trip to Australia and New Zealand. In addition I have used it extensively at home in Thailand.
My main interests are travel and wildlife photograph and it caters for that really well. I particularly like the way it allows me to safely change lenses, even when bouncing around in the back of a Land Rover.
In the main compartment I carry my Canon 60D with a 17 to 55 mm lens attached; a canon 70 to 200 mm f4 L lens with lens hood attached (but reversed), a 1.4 X multiplier and a set of three Kenko extension tubes. I can also keep a Canon Speedlight 270EX II in there, if I think that I might need it in a hurry.
In the padded cover to the main compartment I keep a spare battery, a spare card and a polarising filter.
The outermost front pocket is normally empty except when I am travelling; then I keep my Passport and tickets there along with any other documents I might need access to.
In the main front pocket I keep a torch, spare batteries for the torch and flashgun, cleaning gear and a pen. That leaves plenty of room; when travelling I normally keep a book in there as well. There is an internal zip up compartment in there that I haven't found a use for yet!
In the top pocket I carry a battery charger, a second torch, some plastic bags and of course, the case's own waterproof cover. I also keep a Black Rapid camera strap in there, for the occasions that I want to leave the case behind and just carry a camera with one lens. That leaves plenty of room to stuff in a wallet, watch, mobile phone, coins and anything else that might present a problem when going through Security at airports.
I don't normally travel with a rigid tripod, but I took a flexible "gorilla' to Sri Lanka. It wasn't particularly happy with the tripod carrying system, but I think that was because of its flexible nature; I'm sure that a rigid tripod would be happier. If not carrying a tripod the pocket comes in handy and will take my flashgun.
Because this is sling bag, as opposed to a backpack, it does put a lot of pressure on the left shoulder and after carrying it around for a day I begin to notice that, but it is a small price to pay for the convenience that the sling design provides.
It happily fits into the overhead locker on most planes, I've had it on fourteen flights.
Chiang Mai, Thailand