love this product . pure genius ! and people point and stare at we little girl chill in she seat through the airport everytime . so many people comment on this . we have a Britex Marathon and we 2 year old love she carseat , so we definatly take it fly because it keep she happy be in she comfy space on the plane . but lug it around would be a nightmare . these strap be SUPER easy to attach and a dream come true . I can check the stroller and do not have to worry . we can even attach she to the bag while she be asleep in she seat at the end of a flight . its that easy , and the harness thing can fit in you pocket . -lrb- we store it in the small pocket of the bag we attach she to so we always know where it be when we get ready for a trip -rrb- we have only take it attach down a Alaska Air plane isle , American we have to take it off and carry she in the seat , because it be two narrow , but that be she carseat problem obviously . its simple , its easy , and its strong enough even for a Britax . the only thing I personally would recommend , be 5 ' 8 with a hubby who be 5 ' 10 , be get a sturdy carry on size bag with a longer handle than most . the extra weight of more than the bag , have to bend a little to accomodate a short handle , be a little tax on the body , but that a easy remody . also a bag with good wheel not a cheapy one you have to fight with without the carseat on it .