We visited Dublin for the Weekend, checked in pretty late at about 11pm but Louise was pretty cool with that. She and her husband, stayed awake till we arrived and handed us the keys for our own room. We barely had contact at all, but they were pretty informative and helpful via the airbnb chat. So they told us how to get to their place (Hilton Express 3€ [coins and notes]) and to get a leap card, to travel around in Dublin for very cheap (I think we paid 9€ each for 24hours, so that we could use it on the first day and on the last, when we had to get to the airport). With the leap card you can use bus, tram and train. Also the airline-express for the airport. But they are only available at a few points in the city. So when you arrive early enough you can get one at the airport, otherwise u have to get in the city by bus [only coins/no change] for about 3€. Thanks EU Roaming, it was easy to get informations about the busses, the timetable and routes.