The largest one fits snuggly in my medium sized suitcase in a set of three, and the other ones can be packed nicely with it. I have a tendency to try to cram a lot of clothes into my suitcases so I thought these might lighten my load a bit. The zippers haven't broken on me yet, but they do seem a bit smaller and fragile. When I got the cubes the zippers looked like they were broken because it was attached on both sides, but if you unzip and rezip they should be just fine. The straps inside help with packing in close without putting strain on the zippers, but of course the cubes will still have a limit.
I just received this yesterday. I love the color and how light weight it is. The only issue I can see is that the zipper will not last. My trip is next week, and as I have started packing, 2 of the zippers are already coming off track. I will not bring those two bags, but if the other ones do the same I will be returning this product.
I liked this product a lot. One arrived and the zipper was not smooth when opening and closing. I thought it would flatten out but it didn’t. They helped me pack everything easily and Organized even when I was over seas it was helpful to have. I would love to contact the company since I have all cubes in tact except one