Did his homework as a churchgoer and scholar. Writes in a stylistically formalized way. Speaks of evangelicals as objects of historical curiosity. Dismisses, it seemed to me, the important question of whether or not the Bible actually can carry divine authority.
The thing I liked the most was his careful rhetorical analysis of a portion of a real-live sermon. He showed how the Bible is used, well in this case I think, to demonstrate contemporary relevance for Americans.