I got these hoping they would help me maximise my carryon, since that and my personal item would be my only luggage for my trip. Unfortunately, just about every combination of folding/rolling and, different bag combinations didn’t give me any extra space. At best I got about the same free space I would get if I had packed without these. At worst, they were too bulky and sometimes hard to spread everything out evenly to get the pack flatter. I did get everything I needed in all the bags (2 pants in the Large, 6 shirts & 1 skirt in Medium, and 3 undershirt tank tops & swimsuit set in the Small) with my other travel items. In the end, I like how it made my bag neater and way more organised. But, it didn’t provide me with the extra space I was looking for.