Nice place to stay while visiting Dublin.
Location is very good, as you can walk to many of Dublin's popular sites: 15min to Grafton Street, 15min to Temple Bar, 20min to the Guinness Storehouse, 5min to several of the neighboring parks. Even so, it's still in a quiet neighborhood and I had no problems sleeping at night.
Room and bathroom were clean and very acceptable. Because Brian also Airbnb's another room in his home, there's a chance you'll have to share the bathroom with another of his guests. The room is a bit small, but you can tell by the online pictures anyway (and at least as a traveler, I didn't need that much space to begin with).
Lastly, Brian was friendly and accommodating when I needed to reach out to him (via text message). The only time I saw him was at check-in, but I think if I needed to talk to him for any reason, he would have been readily available.
Overall a good place to stay, and would definitely recommend.