The picture shows the product well. Once folded my shirts do not occupy any space but no creasing to report. Combined with other storage cubes, my backpack was quickly transformed into suitcase. My clothes are not wrinkled and it was easy to rearrange the cubes as necessary, to take them out and put them back in the bag.
Level solidity nothing to say, the material is quite thin (understand not rigid, just a rubber edge to give a semblance of rigidity) but seems rather resistant.
The toiletry bag is very classic semi rigid plastic with a zipper. It is a little bigger than a bag-like customs, this plays to a few cm but the customs bag comes in without touching the edges. That said no one said anything or Paris, or Berlin.
It seems rather resistant and was very handy during the trip.
