The pre-booking price of just over £50 for eight days was really good, Not very pleased about getting held up at the exit barrier while we discussed with the office attendant why we did not need to pay the £207.88 as we had pre-booked. We were let through pretty quickely without a problem. It does beg the question why your computer system did not recognise the pre-booking when we entered with the car registration that had been used in the pre-booking? This seems to work OK at Edinburgh and Glasgow -or perhaps this is yet another 'wonder' of Aberdeen International Airport!!