I used this as a personal bag for Frontier airlines since the dimensions matched up pretty well. I packed this thing to the brim for a 4 day trip and it held up fine. It looked large when stuffed, but no one had any concerns to stop me from boarding my flights with it, and it did fit under the seat without any problems.I used a medium sized ebags packing cube to fit all my clothes including: a hoodie, jeans, 2 shorts, 3 tops, 1 dress, & undergarments/socks. The rest of the space in my bag was occupied by my makeup, makeup brushes, toiletries, TSA liquids bag, and a super small crossbody bag.I liked that the bag looked pretty sleek but could easily be wiped clean. The pockets in the front were useful to hold a snack and my earbuds. I used the zipper pocket on the trolley sleeve to keep my ID handy.If I had to throw in one con, it's that there's no cross shoulder strap. My bag was a little heavy, but I made do.