I had a very good experience with book 2 park . It was super easy to use. I learned about this service from a friend of mines. I purchased my reservation online and printed out my confirmation. . The price was $7 a day but they add a processing fee of $5 I believe. I was not to happy about that. I found a coupon on line that I was abe to apply and use that was $4. My total cost was $29 for the service. I had to print out my confirmation to be presented when I arrived. I parked my car and got on the hotel shuttle. The shuttle picked me up at the Crowne Plaza in Old Town Alexandria VA and then made amother pickup at the Holiday Inn which is in close proximity. The airport is about 2 miles from the hotels. The shuttle dropped me off on a Friday at the airport and picked me back up on a Monday. The shuttle ran every 30 minutes which was reasonable.I just had to wait outside at a designated pickup location at the airport. I didn\'t have to wait long and they even provided service on the Fourth of July holiday. When I returned to the hotel I picked up my car and was on my way home. I would definitely use this service again .