J.
We used the original with my daughter for a couple of years, and everytime we were in the airport with it were questioned on where we got it. Definitely a lifesaver. We didn't check our carseat at the gate. At least with the original version you can buckle your carseat into the airplane seat without taking off the wheels. Just make sure you use the seat belt extender. On my first trip I didn't, and while I was able to buckle the seatbelt without it we had a very difficult time getting the buckle undone as it was behind the carseat in a hard to reach position. We had two airplane mechanics helping trying to get it unbuckled and were close to removing the airplane seat when we finally got it undone. As long as you use the seat belt extender to position the buckle to the side of the carseat you won't have any problems. Happy travelling!