I've been using the bag for a few days now and use it for work, hikes, and soon, on weekend trips.
I can store a Stanley thermos in the side pockets, as well as smaller items by pulling the strings. The front pockets are spacious when fully loaded; empty, they fold up neatly thanks to the pleats. The main compartment is one large space. I use separate dry bags to organize my gear. This is better than sewn-in compartments. You can secure items at the top, bottom, and sides of the rucksack with additional belts and buckles.
The canvas is heavy and durable, feels premium, and has strong seams. The bag will definitely need a few years of intensive use before it shows first signs of wear. The straps are genuine leather and thick, making maintenance easy; just oil the leather and wax the canvas once a year, and you're good to go.