As for me, namely the use I made it perfect (after a few months of use):
- It holds much material.
- It is AW (any time) due to the very discreet cover.
- The interior is quality (compartmentalization, damping materials, ...)
- The exterior is solid.
- The handle and strap are soft and smooth material that allows not to feel tired after a long walk.
The material that I put:
- Canon 700d with 17-55mm 2.8 (+ 18-55 in the adjacent compartment)
- Canon 10-22mm
- Sigma 35mm 1.4 ART + visor
- Sigma 50mm 1.4 + visor
- Canon 100mm 2.8 Macro
- Canon 70-300mm
- Flash Speedlight 430 EX II
Besides the little useful material that I put in the pockets zippers (filters, cleaning kits, extra battery, ...)
If we leave everything open and that we walk with the strap on the shoulder, it is possible to take pictures without removing the bag. You just have to prepare material before so not to have to leave its case, and with the habit, it will itself (it must, ride, still limit the number of targets on ourselves , weight begins to be felt).
In short, I think it is essential given the price.
Now he only needs the test of strength over time, but that's not my few months of use I can express an opinion.