Mary's place is located in the most lovely neighborhood with great spots to eat, have coffee (Butler's!), and watch the people, dogs, and cyclists go by. It is also very well located relative to the city center. I managed six cities in three weeks on my European travels this summer and I slept the best at Mary's (after so many terrible pillows, Mary's helped my sore neck recover). My only regret is that I didn't get to stay in Dublin longer.