I've use this service many times over the years and whilst parking at the Hotel has never been an issue, the only gripe I've had was waiting for the return shuttle bus prick up at Dulles airport, which in the past has been sporadic to say the least. The wait times ranged from 15 minutes to 1 hour in the past. However, this time around, there were no delays what so ever and it was back in my car within 15 minutes of leaving Dulles airport. Just to state the attendant service was excellent this time as well.