We are leaving on a family cruise in a few hours and are only using the plastic ties. We are not flying in but feel a little security to our luggage won't hurt. I'll let you know later if any of us got ripped off.....
RCCL, 1992, 3 days, Empress of the Seas
CCL, 1997, 7 days, Celebration
CCL, 2007, 7 days, Legend (first family cruise)