Unfortunately, the dimensions stated are not, the bag is smaller. The real internal dimensions are 20 x 9 x 16 cm (W x D x H, main compartment).
Here are the details of what fits in the pocket, misleading.
In this bag fits effectively: 1 Body with lens up to 10-11 cm, 1 flash or 1 lens, charger, a pair of filters and small accessories (cables, cards).
For me, just fit another EOS 70D with 15-85mm EF-S, Bllitz 430EXII, charger and sun visor.
For emergency can perhaps reinkriegen still a very compact lens such as EF 40mm.
Who needs a compact, well-made bag only for the daily needs, can access, however, should the Lowepro Apex 140 watch. Since effectively fit in the same thing, the floor is rubberized, it is cheaper. No separate accessory compartment front, but more depth and inner compartment forward.