Decidedly mixed bag. Many great principles and helpful lessons, many dispensational sillinesses and unhelpful instructions like "don't be pedantic". No one tries to preach poorly; when giving such instructions, examples are critical. (Cf. Carson's Exegetical Fallacies) The tone of many chapters comes across as desperate, as if preaching is failing all over the world, and this book represents the final bulwark against bad preaching. Also, the citations are less than professional - one author quoted Luther at the Diet of Worms, and footnoted RC Sproul's Holiness of God. Great book, but hardly an authoritative source on what Luther said. Secondary sources abound, to the detriment of the book's overall ethos.
REP is probably best used as a diagnostic for individual elements - if your intros are lame, check out the appropriate chapter. But if you are just starting out, and weak in every area, the tone of these articles will leave you with the impression that with only 80 hours of sermon prep per week, you too could preach like John MacArthur. ( )