I bought the under seat version and it packed nice, rolling was horrible. Soooo I bought the zip sack with trolley and again packed nice using the zip cubes with both luggage. What a time trying to pull this thing through the airport. Don't waste your money. Won't roll on two wheels hits the back of your feet, trying to drag it on all four wheels it definitely no better. My hand and arm were sore, trying to go through the airport in Atlanta was horrible, if you have ever been there than you know how huge it is! Wish I could return it terrible.