This is my first experience with packing cubes, previously used the roll/squish vacuum type compression bags. These bags are ok. Have used them on two week long work trips and they've held up so far. Not sure how others are getting all of the bags to fit in a carry on suitcase .... my case must be much smaller, the large cube filled up almost the entire case. As other have noted, zipping the bags is a problem - you need to zip them very slow and put your fingers under and in front of the zipper to keep the fabric from getting caught and even doing that, it does sometimes still get stuck. The compression is, well, not very impressive - maybe different fabrics compress differently -- I had jeans and shirts, rolled in the cubes? Another issue is getting to your stuff without everything falling out of the bag because the side walls collapse when unzipped. The two zippers on the bag can be confusing too, they look the same and it's tough to figure out which one to unzip to open vs uncompress -- it would be good if the zippers were a different color or had some visual cue as to which is which. The other issue I ran into is there is no way to separate clean from dirty clothes if you have multiple stops in your trip or even when you pack to go home and have unused articles. Used the laundry bag as a shoe bag -- double duty!