I had the medium size organizer and found it too big for my needs. I like to travel light. The small is just right for me. I don't wear makeup or anything and needed something very simple and economical of space. The hanger is the best part.
This is my third purchase and that's simply because everyone in the family wants one. Yes, they are that useful. Lightweight, pockets for everything, hangs from its hook, and even has a non-glass mirror.
I have the larger version and loved it but when we started having to separate out our 3 oz liquids when traveling then it was just too big. I bought the smaller version and it fits all my non-liquid items perfectly. I am also able to carry my husband's few items that he packs. I love being able to hang it up on the door and have everything that I need right there. Only trivial complaint was wish I could have picked a brighter color then grey for my monogram.
First ordered the small but was much smaller than I thought. Medium is perfect. I take to the gym and it holds all my stuff that helps me get ready for work in the am! Very sturdy and tons of pockets and extras! Would even work for a weeks vacation!