Jeanne's place is a lovely apartment located in Santry, a neighborhood north of Dublin city centre and a 10 min drive (also accounts for the bus) way from the airport.
The room consists of spacious closets, a bed and a small bathroom. Enough for a single person or two. The room is inside Jeanne's apartment and she's very hospitable with coffee, tea and some sweets/snacks. It was really nice to meet her.
Also Jeanne has two cats who roam around the apartment and are very sweet too, if they get to know you a little better... ;)
From the apartment, it's around 30 minutes by bus to the city centre. Didn't track the exact time too well though.
In short, a nice stay in Dublin!