Eh ZAG, not quite the same, Dublin Bus are state run company who don't really care about you as a customer and the German company I named are a private company who should be more caring - I was told that the bus passes 5 minutes away from the hotel but 5 minutes when you don't know which direction to travel when you get off the bus.............. Plus, for anyone reading this - it is infact the S-Bahn that serves the airport not the U-Bahn, S1 or the S8 will take you to Marienplatz - Centre of Town.
Stobear many thanks - you might have sorted the problem for me