My daughter has it and we were able to put all her luggage (2 outfits per day - 6 days) last July in it for our trip to Disney. She used the large one for clothes, the small one for toys and then the backpack for carryon onto the plane. Worked great. What I liked is they were small enough she could pull them through the airport herself.
She's used it a lot since then and it's taking all of her beatings pretty well too.