The bag is designed to lift the side of the camera, the shutter half open.
So it is difficult to find the right mix separators to properly use the available space and can quickly get out the camera.
It also depends on the use to be made: if we want to hang out or no additional goals.
I use it for a few months to a Canon 1200d camera with a target of average size (Tamron 17-50 f 2.8 with sunshade) and therefore the bag is too big for this need. But with a big telephoto lens on the case I do not quite see how I'll put it to easily get out the camera (telephoto be room next door, no problem). As against the camera with telephoto small (as with his Nikon 18-105) come good, but it is space around.
Personally, I put a camcorder next to the camera.
The top part can be handy. And the best thing are the straps that can secure the bag around to the free air activities.
Overall I'm happy and I use it often.