Wish I'd gotten this a long time ago! Although there's only three of us when we travel, we all bring a LARGE suitcase and a carry-on, along with my LARGE purse, so it is NOT easy (oh, and all of that while pushing a stroller!). These things were AWESOME - easy to put on and held the carry-on SO securely to the top of the large luggage - NO STRUGGLE WHATSOEVER!! (Oh, and the fact that all of our large luggages were the spinner-wheel type helped a LOT - just gently pushed each luggage with the carry-on strapped on top - no pulling, lifting, etc.!) I had also bought one of the simple straps that allow you to essentially "piggy-back" the carry-on to the front of the large luggage (strap just goes through each handle, forming a loop that you close with a plastic latch), but this was completely useless - cumbersome, made your luggage MORE difficult to move, made the bundle of the two WIDER (vs just having one on top of the other with this Travelon strap), and the carry-on would make the luggage tip over!