Never use it.I recently used it for parking close to Dusseldorf airport. Everything went ok until I arrived to the parking lot at 2:00 am and they didn't have a place for my car. Therefore, I had to go to the only opened parking lot at that time where they charged me whatever they wanted of course (official ones from the airport don't take last minute bookings). That said, because of Onepark not having good communications with its business partners I almost lose my flight and I lost a lot of money. Same happened to a lady that arrived later one.
