Michael's apartment was really beautiful and spacious, with a fantastic balcony, view and location - I really enjoyed staying at this apartment and would gladly stay again!
I happened to stay there through a few unseasonable hot days and the apartment did get a bit warm during the day (it has these amazing skylights in the main living area, which let in a ton of natural light but unfortunately also turned the space into a bit of a greenhouse), but it cooled off at night and was very enjoyable otherwise. For most Europeans the warmth would probably be welcome, but for us AC-loving Americans, the lack of airflow was a bit uncomfortable (but I understand these warm days are very uncommon in Dublin so my experience was probably just a fluke).
The main area of the apartment is really quiet and backs up to a beautiful church (there's even a view of the Wicklow mountains!), but the bedrooms do face the street and there's some noise pollution (a lot of horse drawn carriages pass by because of the Guinness Storehouse right around the corner, which I found quite charming, and most of the street noise dies down after 11pm).
Overall the apartment was really lovely and I would highly recommend it to others!