We traveled this past trip with 3 kids under age 3, so we consequently had 3 carseats. We tried to pre-board, but the airline wouldn't accommodate us. So what we have found out is that even though it seems to make sense and get your seats at the front of the plane, I would go to the back. We had seats in the front. We had to fight with getting the carseats down the aisle with people sitting in the seats already. Unfortunately some people got bopped accidently while trying to get to our seats. We also held up the plane trying to get the seats hooked in. If you are in the back of the plane you are able to take more time to hook in the seats and not feel like you are holding up the whole plane. Just a tip that we will use the next time.