Very nice, versatile bag!
I've owned 4 camera bags now over the past year. I must say, so far, this has to be the most versatile bag I've ever owned. It's comfortable to wear and I'm able to fit all of my gear (Canon 30D w/grip, 430EX flash, Sigma 24-60, Tokina 12-24, Canon 85mm f1.8 and Canon 70-200 f/4L) plus many other odds and ends. I still have room to expand. The biggest draw back in my opinion is the fact that I have to access my gear with the bag off of my shoulders. Not that this is really a big problem for those everyday quick photo trips but if you're walking around with it on and needing to change lenses, it could get frustrating. I've yet to take it out on a long day away from home but I believe it would do just what I wanted it to do. Other bags I've owned are the Canon backpack, Lowepro Rover, Domke f4. I really like the fact that when I go to air shows, with the added security, I can't take the whole pack with me through the security gates. But, I can take the camera block out and use it as a shoulder bag. It will let me right through the gates!
Overall I'm very happy with my purchase. It seems like a very sturdy, well built bag that will provide me years of service. It has to be the most comfortable bag I've worn with it loaded down.