I've been meaning to read this for over a year. Just recently I was overcome with the desire to read/learn about Irish people, which was the final motivation to actually start the book. I was in no way disappointed.
Setting: Killala, Ireland, 1847, also New York City. Every description was done so, so well: Ireland's relationship with England (and subsequently Irishmen with Englishmen), the national pride of the Irish, the history of the Irish people ... I also very much enjoyed reading about the Irish situation in the U.S.
Characters: What amazing, real, raw characters! I absolutely loved the passion they--especially Morgan and Daniel John--displayed for Ireland. Nora was an annoying character, admittedly, but she always acted within character. Without giving spoilers, her prayers were just so real. Oh, and I can't forget Michael Burke. It's unfair, really. He's an Irish policeman. In New York City. He could be terribly written and I would still love him. It's just that he was exceptionally written, so I loved him even more. (Totally personal, of course; if a reader doesn't particularly care for Irish policemen, then they might not care about Michael as much)
Faith content: Very good and natural. As I said, Nora's prayers were realistic. Morgan's struggle was also real. I loved the inclusion of the Protestant vs. Catholic tensions.
My one complaint is the somewhat graphic description of an amputation. Honestly, that could make one squeamish. Still, I would recommend this to anyone who enjoys learning about European history and immigration to the United States.