Jessica was really great and friendly (Sebastian was away for work so we did not have a chance to meet him)! We could ask her for recommendations and help whenever it was needed, and everything we might need was provided (guides, WI-FI info, fresh towels...)
The room was very comfortable and clean, and the apartment was well situated, we could walk to the city centre very easily.
We only stayed for a few days in Dublin, but staying there was definitely a great choice, and we would definitely recommend, however long you might stay.