I've bought these to go on several Int'l flights in the very near future. You CANNOT beat 4-wheeled luggage!!!! The distinctive colours - mine is the olive, makes spotting them a breeze and no-one - literally, can attempt to misappropriate your pieces at the luggage rack/turnstile. If you're travelling solo - like I do, just use one of the detachable handles which comes with the set and tie it through two of the pieces - they roll in unison... Such a positive when you have to run after connecting flights... lol Oh and they also have zippers to make them wider to hold more stuff for you shopaholics out there. I will be making a much longer haul to South Korea then Switzerland next  month and then the UK.  By then I think they may look as though they've been through the Afghani war, but they are worth it! Negatives - It's first stop - Miami to the Caribbean, and it's already scratched up. The inner strap that also holds the clothing in place - well one burst from the mid-sized piece already. But, purchase this if you don't particularly care about those little things, like I do and just want to know your pieces get to your destination with you!! And that your clothing doesn't get wet if the airport staff leaves them out on the tarmac in the rain or snow for a long time!!