Great location, right opposite the dart station that takes you to Tara Street. The noise didn't bother us, the dart doesnt run late at night (not after 12, I think) and starts again about 6 in the morning - might not suit light sleepers but fine with me.
All facilities you could need in the kitchen plus hair dryer, ironing board etc. We did walk in to Temple Bar and it's a good 50 minutes, but if you don't want to, day return on the dart is €3.30 each. Tesco metro 2 minutes by car if you need it and The Orange Goat, about 10 minutes walk away, did a lovely breakfast.
We will definitely check availability when back in Dublin.