As a person interested in theology I found his discussion of modern doctrine, sin, and worship to be completely fascinating. This book does not set out to change anyone's core beliefs about God, but it very well may change your view about how the church approaches God, worship, and evangelism.
Although I am a lay reader, I have read quite a bit of theology and was comfortable with some terms that Wolfe takes a bit for granted. A person who has trouble distinguishing between the terms "evangelical" and "mainline", or thinks that a church using rock music might be called "liberal" could have difficulty with the text. Wolfe could have included a short glossary at the end of his book; this may have made this important text more accessible to lay readers.
I strongly recommend this book to any person studying religion or theology, or to any intellectually-minded believer in Christianity or Judaism.