I've lived in Arbour Hill/Stoneybatter, not too far from Heuston/Benburb Street and the quays (Wolfe Tone, Ellis, Arran) - albeit in a townhouse development and not an apartment - for the past 10+ years and find it and the surrounding areas grand overall. As somebody else mentioned on another thread these are effectively city centre areas so it's not like the "leave your doors open middle of the country" by any means and like any city centre area anywhere there are problems and oddballs but from the previous post some people might get the impression that they are no go areas and I certainly don't think that's the case from my own experiences.