Upon receiving this bag, and based on other good reviews, I examined it carefully to see firsthand all of the features and how it works.  I must say, I think they have thought of everything.  It easily packs just like a large wheeled suitcase, with unbelievable storage and large compartments -- but the bag is narrower like a carryon, and not near as wide as those big monsters that are hard to maneuver through doorways, etc.  I don't think you'll find another large and easy to use piece of luggage anywhere.