this be we first time travel with we little one , but I can not even imagine have to have carry two carseat and all we carry on and manage a wander 2 year old and a bossy 4 year old . for the time where we have to unstrap the seat to get on the plane , I be eternally grateful for the strap make it so easy to get through the rest of the airport . a MUST BUY for everyone with little one !!