The entry procedure is fine and easy. The exit procedure, is where I have issues! This is the second time I have used the priority section and each time I have issues of trying to exit the car park at the exit barrier. On both occasions I have pre booked the priority area in plenty of time to take advantage of the discounts. Each time at approaching the exit and inserting my ticket, the ticket is rejected saying that I have not paid the correct amount. Each time having to ring the help line, who after checking my details, etc, etc, raised the barrier. I travel a fair few times to the airport and going into Priority is a convenience but I will be thinking twice before booking again.