Overall, Frank's place has good value.
We recommend anyone to stay there who is travelling light, looking for a place in a great location near the touristy parts of the city. Frank was extremely welcoming and helpful and it was great to be able to use his kitchen for making tea!
On the slightly less positive side, the place was very difficult to find, even with Frank's detailed instructions and close coordination. Guest will likely need to plan ahead to be able to communicate with host in order to find and be let into the apartment. The place had a strong but not repulsive odor that could have been partly related to cooking and partly to not being aired out recently.
Overall, we had a very good time with our stay in Dublin and are thankful to Frank for his hospitality :)