I already owned Crumpler Messenger boy bag before, good quality bag but not as ergonomic as Jimmy Bo 700 bag when come to country walking or mountain biking. Can wear on your shoulder or adjust it to fit your waist like pouch. Its compact, looks small, but I managed to get my telescopic lens (70-300), my primes 30s & nifty fifty, and my standard lenses with the camera body together in this bag plus accessories (spare battery, lens hoods & filters with casing), the good news is even telescopic lens on the camera body, it still fit direct into the bag.
What else can you get from it?