Alamo and National share the same location, and the cars are interchangeable. At the self-service kiosk, you can print the contract in about 5 minutes, then take it and choose your car. We rented a luxury car and initially saw only a Volvo S80, which was nice but we were expecting something like a Cadillac. We asked the staff, and they kindly checked for us, eventually bringing out a freshly cleaned Infiniti QX60. It turned out to be perfect for long trips over the two weeks.