Not a good experience, having pre booked my reservation on line, as usual on trying to exit the car park I came up against the ticket machine telling me I had overstayed my ticket time (I was actually 10 minutes earlier than I had pre booked for !), I then press the button to talk to some one who takes a age to try and find my reservation number I was asked for it 3 times, then to be told "you have to put your ticket in the machine before it will open" !, this I had done as the machine told me my ticket had expired. Eventually I was let out after a 10 minute delay. This is the 3rd time in a row that this has happened to me and always I have pre booked my stay. Please sort out the ticket or number plate recognition system as it is very frustrating. I now expect my ticket not to work on exit and I am always right.