I had been wanting to try packing cubes for awhile and I finally did and I wish I had done it longer! I am always traveling and these have made things so simple when packing/unpacking, looking for something and most important getting everything to FIT in the most organized fashion in your suitcase! I have put some strain on the zippers and so far no issues there. I'm planning on getting another set as a gift for my MIL who travels for work.