Using Book2Park was easy, convenient, and stress free. We stayed at the Crystal City Westin for the night before departing. They were friendly and accommodating. We parked our car in the underground secure parking garage of the hotel and didn�t have to worry after that. The hotel shuttle took us to the airport the next morning in minutes, dropping us off at our terminal. The return was just as easy. We waited about 10-15 minutes at the Hotel pickup area for the Westin bus. They returned us to the hotel, who then checked our parking pass, validated it and we were done. It couldn�t have been easier.