I picked up a timetable this morning and thought it was worth a mention that the schedule has recently changed.
Previously the bus ran on the hour every hour from the harbour, and on the half hour every hour from the airport.
Currently the service commences at 7am at the harbour and runs every 1 hour + 10 minutes, ie 7am, 8.10, 9.20, 10.30...........till 00.30.
The first bus from the airport is at 7.35 and then again every 1 hour and 10 minutes, ie 7.35, 8.45, 9.55,,,,,,,,,,,till 01.05.
Great service - only 30 minutes and 1.50 euro.