It felt a little one sided, albeit expectantly as the author is male, leaving one wondering what a female perspective of the same premise would be. (Though it doesn't surprise me that it was a male to first go through it...)
But that is not much of a review. Coming from a liberal/agnostic background, I could not read it straight through, occasionally wanting to ask Kevin Roose why he doesn't ask some of his fellow hall mates slightly more challenging questions on their views and beliefs, as well as beginning to feel a little bit of the indoctrination myself. Coming from an anthropology background myself, I also had the urge to give some pointers on participant-observer, which is exactly what it sounds like.
Overall, it was a pleasant read but not as in-depth as I had expected.