This Hotel is probably the best value for moneyhotels in Dublin. Great area (by Google and Grand Canal), right by DART, nice rooms (rare in Dublin!), and the pub attached is very popular. Book it!
Don't forget to do the Aviva StadiumTour! Great new stadium just around the corner. The tour takes only a hour and they show also a cool movie of the history of the stadium!
Quite far away from downtown (20-25min walk), very friendly nice staff and good size rooms. The breakfast is good but everything seemed either too salty or too sugary. Next to Google ghetto is a plus!