We had a great stay at Tom's. Though we never met Tom personally, his roommate, Alex, took very good care of us. The room is spacious with a very comfortable bed. The bathroom is also spacious with a great shower. We had access to the living room and kitchen, which was well equipped with nice furnishings. As well we were able to use the fridge. The location is a bit removed from the city center, but still walkable. Alternately there are several bus stations nearby.
Highly recommended if you're visiting Dublin!