We flew from Philadelphia to Barcelona on American Airlines. The flight was fast and smooth. We were seated in extra legroom seats in coach. The service was fine. I'm assuming we got the same level of service as everyone else on the plane. It looked like there was enough space for everyone's carry on luggage. No complaints.
Although this has nothing to do with American Airlines, Barcelona's airport has its own story. The line for immigration was incredibly long. I'm guessing there were at least a couple of hundred people in line. As we approached 9:00 AM, only about four of the twenty counters were open. This could be done a lot better. There's a train from the airport into the city. We followed signs, but couldn't find it. It was easy to find the airport bus into the city. Itbran about six euro. It was very comfortable.