It securely held ten days of clothes, toiletries, make-up, pajamas, my travel curlers, and ultimately, souvenirs.  I used two net bags inside to help separate slacks from tops and used the net pocket in the top for underwear.  I didn't need to use the expand zipper until the return trip when I checked the bag across country on Southwest airlines.  Traveling to my Boston destination on United, I used it as a carry-on with no problems.  The side straps helped give me a feeling of security.  Travel documents, snacks, and a book were easily accessible in outside pockets.  The side handle and shoulder strap were tough enough for me to carry the 23 pounds with no problem.  (I'm 63 and not exactly the backpack type.)  It did get heavy schlepping it into the subway and carrying it about six blocks - but it was manageable.  It's a tough, good looking travel bag - worth the money.