The materials used seem durable and long lasting. The stitching is solid and didn’t give an inch even under heavy loads (25kg +). Sure enough the shoulder padding isn’t made for such heavy bearing but It gets the job done comfortably until approx. 20kg (at least for me).
The huge roll top leaves enough space to fit whatever extra gear you find and if not needed it’s easy to strap down to a minimum. The compression straps on the sides really help to secure the load.
If required you can fit 1L-1,5L Nalgene water bottles in the pockets on either side without hindering the packaging inside too much.
On the inside there are several small pockets attached to the sides of the bag which make organization a piece of cake. Additionally you could use a bladder. When carrying wet clothing you can put it in the front pouch on the outside to let it dry without getting everything inside soaking.
If by any chance you get caught in heavy rains, the pack is able to keep stuff stowed inside dry for a bit, but it is safer to take a rain cover with you.
For reference; I used it for a multi day hike and could fit in sleeping bag (3 season), sleeping mat, 2x 1L Nalgene bottles, first aid kit, compass, knife, maps, stove, gas can, pot, 2 sets of spare clothing, down jacket, rain coat, food for 4 days for 1 person and attached my 1 person tent on the outside.
The only negative thing I could imagine is that there is no zip pocket on the outside for the gear you’d like to be easily accessible while hiking, e.g. map, compass.