So far so good. Using it for the first time and its Trans-Atlantic. Only issue so far is the laptop/tablet sleeve is on top so it is way heavy when you have to open it to access your clothing.

Zips are sturdy and easy - can put padlocks on them easily and securely.

Scrunches down pretty well. Side handle is offset so if its not full and the laptop is heavy its easier to hold upright.

Will update on the other side.

Update after journey:
It was very easy to use. Straps are wide enough to not pinch your shoulders and being able to pack them away prevents snagging while on board or moving about.
I don't feel safe using the small front pocket for my Passport and wallet since it would be behind me, but it's handy for security check lines. I added a few items to my load and the suitcase partition handled it well, and the tightening straps are sturdy and hold the case's shape well.
To make it easiest to carry ensure you pack well - folded flat and organised, weight well distributed.
I travel with a fold-up day-pack and that was useful to allow under-the-seat storage of things I would use through the flight (like toiletries, Kindle etc. so the large bag can stay in the Overhead.

I recommend.