I got this bag today and for what I wanted to do, it was smaller than I expected. What I wanted to do was put two Nikon DSLR's with lenses AND my SB700 flash in the main compartment and was actually shocked that everything fit!!! I have a D3200 that has a Tamron 10-24mm and a D5100 with the Sigma 18-150. Both of these can be easily put lens down into the bag, and and still have room for the SB700. The Tamron has a 77mm hood and it fits using the little divider. I have one divider that won't be used at this time. For me, my preference is to not have to swap lenses when I'm "on the go".
The bag itself, however, is a bargain on price vs quality vs features!!! One the key features for me, is having the handle on the top. Makes it just that little easier to handle. There are enough compartments, etc. to actually hold a lot of extra "stuff" :-) It's size is actually quite deceptive in what it can hold. The other thing that is nice, is being able to attach a tripod to the bag. There is a pocket at the back of the compartment that can hold a full sized iPad though it's a little snug with my gear.