Joseph is an awesome host. His Dublin flat is recently renovated to a very high standard and sparkling--and I mean sparkling!--clean. My 6-day stay was to help settle my daughter into university at UCD, and it worked out very well. I would *absolutely* stay here again if he'll have me.
Possible downsides: this is a room in a 2-bedroom flat with a shared bathroom and kitchen. As a woman on my own, I had to take a couple of deep breaths with respect to sharing space with no locking door to the space. Aaaaand... it was completely fine. The bus to UCD is a beautiful 10-minute walk away along the river. In the other direction, a five-minute walk will take you to the bus to downtown's museums and galleries and Trinity and the main shopping district. Bonus: Trigger the French bulldog is absolutely adorable.