Does anyone have any experience with taking a child's booster/carseat on a long-haul flight as checked baggage?? We are travelling from Australia to the UK via USA next year, and we are considering taking a long a good-quality booster seat for our 5 year old. She's a bit big to be sitting in it onboard (Qantas recommend children over 18kg do not take carseats on board), so it will have to go as checked baggage. A few people have asked me if I think my carseat will arrive in one piece at the other end, so now I'm a bit worried!! If anyone has any experience with checking in a carseat, I would appreciate your views!