We stayed at Adrienne's BnB for one night before flying back. The twin room's nice, facing the street. Since it's a quiet neighborhood you shouldn't have a problem sleeping. It's a 10-15 min drive to the airport, a convenient location. There is a mall around and several fuel stations (all for nearly the same price).
We couldn't have breakfast since we left at 4am but Adrienne was very kind and understanding.
The place is good for one night but if you're interested in visiting Dublin I would recommend something closer to the city.