Spirit is the worst airline you'll fly in America. Be prep to pay $45 (each way) for any carry-on larger than a fanny pack. Explains the 45 min boarding time for a national flight.
AA baggage claim is horrible there are no signs above the carousels. On board they will announce a carousel and when the bags come out it is a different carousel.
Don't expect anyone to be nice to you this is the worst airport I've ever been to. Don't expect to get a good meal either. Hands down worst airport I've ever been through!