I took this travelling around Africa for 2 months, including a trek up Kilimanjaro (ok, the porters carried it up the mountain)
It is spacious and simple. It has one inside pocket underneath the main flap. The bag was battered but not bruised for the whole 8 weeks - it got dirty and dusty but was very easy to wipe clean and looked like new every time.
Yes, it has shoulder straps however these are not really suitable for carrying for long hiking distances.
I put it under A LOT of stress after buying way too many souvenirs on my holiday, adding several more kgs and bulk, yet the zippers and stitching did not falter when packing everything to come home.
I am truly impressed with this bag! I've bought myself a 100l since being back.