A fairly large main pocket for a laptop of 14/15 "and a tablet of 10", and it is room to slide magazines, books, etc ... This opens pocket big enough and is almost the width of the bag. A small pocket on top to slide ... the little things, but I would not put a phone or a wallet, too risky there. A large fine enough pouch that opens almost completely, with 4 compartments (2 adults and 2 toddlers for pens). For me, the compartments pens are too many, in fact, I rarely have to put pens in my bag. One would have been enough already. Another front pocket, smaller than the last, but equally fine, which opens only on top. In the last 2 pockets, especially there will things flat.
On the sides, 2 pockets, one with a small net, convenient to slip a small bottle of water!
Finally, in the bag, a pocket with rain cover ... neon yellow! Do not worry, you will be seen in the rain! By cons, we must bend a little bag to put on, so with a bag full well, I think it must be quite complicated, especially if you fight with and put it under the pouring rain. But it has the merit of being there.
In summary, a bag after all quite convenient, which is well suited to a shift in the train to slide the PC, the tablet, something to read and what to eat, plus a few odds and ends.