My favorite thing about packing cubes isn't that they save space (they do), or that they look good (they do), or that they make packing and unpacking easy. What I love is how they turn my written packing list into visual cues. I don't need to rely on a list to remind me about what I need. If the bag I use for underwear is empty, then I know I still need to pack underwear. It's in tune with how my visual mind works.The bags are well-made from good materials. The ripstop nylon is lightweight but durable. The zippers work smoothly and don't catch or bind on the fabric. I was a little worried initially when I noticed that one of the closed zippers had a gap in it, but it healed when I opened and closed the pull. Then I tried to "break" the zipper again by tugging on it hard. It held, and hopefully it will continue to do so. Other than the shoe bag, these bags are meant to be used for clothing, so I think the stress on the zippers will be minimal.There's a good variety of shapes and sizes in the kit, and they fit well in my suitcase. I particularly like the compression bags for their space-saving ability. They have two sets of zippers, one to open and close the flap, and one that compresses the side gussets. Just press down gently on the clothes in the bag while zipping the gusset zipper, and the bag decreases in thickness by half. Nice!