We stayed at Paul and Renato's apartment for a week and we had a really nice stay. They were very welcoming, helpful and approachable. The flat is at a great spot near the centre of Dublin and it's very easy to get there from the airport or the train stations. There are plenty places to buy everything you need including a supermarket thats just across the street and closes very late, so getting your groceries after a long day of touring is not a problem.
The apartment itself was very comfortable, the shower worked really well, sharing the main bathroom and the rest of common areas was not a problem at any time and they have everything you need and make your stay a pleasant one. The streets outside are very noisy but the whole place is perfectly isolated from them so its not a problem at all. We would recommend staying with them to anyone interested in travelling to Dublin.