It is very likely that nothing in this book would change the mind of someone who had decided against the truth of the LDS Church, Book of Mormon, gospel, or Joseph Smith. They've made up their minds, for whatever reason, and they aren't going to be swayed.
But for the person of neutral opinion, it could be interesting, and open their minds to the possibility.
For the faithful, it's simply another layer of protection for that shield of faith.
I found some parts more relevant to my interests than others. This book essentally serves as a summary of the vast amount of research that has been conducted in ancient studies, both Old World and New World. Many elements of the Book of Mormon have been mocked -both at its original publication date and currently- as silly or inaccurate. This book summarizes knowledge acquired since the book was translated and published (which Joseph Smith would not have had access to), undermining claims that he was: 1) a total fraud, who made it up out of whole cloth from the elements that he had in the world around him already; 2) a religious genius, who was able to concoct (again, out of his head) the Book of Mormon; or 3) mentally ill, with some particular disease that is characterized by religious obsession. Many of the elements of the Book of Mormon have more recently been found to be supported by liguistic and archaeological research in both the Old and New Worlds, lending credence to the claim that it is a work of ancient, not modern, origin.
Ultimately, the truth of the Book of Mormon is a matter of prayer. There is -as yet- no concrete, scientifically incontrovertable evidence that says "Yes, this is where Lehi landed." Frankly, if there was, there would still be people who would not believe. That's just people.