Quality: excellent quality, the fabric is thick, the zippers are smooth, it works well, I don’t see it getting stuck.Design: love these more than the typical packing cubes because it’s easier to store since they compress! Regular packing cubes are much more bulky.Fit: they fit well in a suitcase but I also like them for duffle bags. Things are likely to get mixed together in a large bag and this helps prevent a messy pile up!Overall: the best part of packing cubes is that you feel like an organized adult. During the trip having everything sorted which made life so much easier, especially with two kids under two, and most of their clothes looking the same! It was also easy to put all the dirty clothes in a unused bag. Unpacking after the trip was a lot faster too! I will definitely be buying more, the next one I purchase, I will get the version where you can see what is inside it!