Anyone used a Rac N Roll or Dream Duffle bag?

I am interested in purchasing either the Rac N Roll or Dream Duffle for my two competitive ballroom dancer children (ages 16 & 18). Since ballroom costumes tend to be much heavier (due to all the rhinestones) than other dance costumes and have extremely full skirts, I am wondering if the either Rac N Roll or Dream Duffle will be able to hold the heavy costumes and not tip over/collapse? Also wondering if the costumes will fit in the bag when collapsed?

Has anyone used these (or something similar) for ballroom competitions?

Dance Ads