Dario met us at the apartment, and showed us around, which doesn't often happen with AirBnbs. The building is very secure, and convenient to the main sights of Dublin.
As others have noted, the street below is busy and noisy (Dardo graciously provided earplugs, which did the trick!). But, if you want to be in a central area, with the Ha'penny Bridge right outside your window, this is the place!