If it's a booster type seat then you cant use it on the plane. I have the Eddie Bauer bag and it's held up great. I use it for the Graco Turbo Booster, and theres still plenty of room in it to toss in some jackets, pack of diapers, wipes, stuffed animal, and more. Its still a pain in the butt to haul around, especially when youre dealing with other carry ons, a stroller and a child, so we always check it with our luggage. Weve never had a problem with it getting lost or damaged. However, the first time we did this I panicked because it didnt come out on the carousel with the rest of our luggage. I though oh no, now what. Turns out, it got put in with the oversized/odd shaped luggage and the pick up was in another spot.
alison