My son and I are traveling soon (sadly not to Disney where this wouldn't be an issue with their transportation) and I will be renting a car. My son is 4. At home he is in a Britax Frontier, but that sucker is WAAAAY to heavy to lug through an airport (and I can't install it by myself on the other end). So...he's old enough (and plenty big enough) to be in a booster, so I could either buy (and lug) a cheap-ish or rent one with the car. My gut instinct, and the gut instinct of most people is that they are wary to use one from a rental place, BUT I've also heard that they take pretty great care of them because it's a huge liability issue, so... Has anyone ever actually rented a carseat (or booster) with a rental car? How did it go? Would you do it again? On the other hand, anyone have horror stories about doing it? Thanks!