I stayed for about a week at Karin's studio. It has great amenities, is fairly centrally located in Dublin, both reasonably close to the main tourist areas south of the Liffey as well as a few minutes' walk from the train station. The studio is bright and clean, with an interesting vintage decor. The only downside I experienced was the traffic noise; the street outside is quite busy both day and night, so best to bring earplugs if you're a light sleeper.