Down and Dirty: This is a compilation product. If you are happy sorting through multiple books looking up rules that you use every session, this isn't the book for you. If convenience is worth 3 dollars - it certainly is for me - then you'll love this book.
The book can be broken into three large sections.
The first, Exploration Rules, is a simple and straight-forward compilation of materials presented in earlier products.
The second, Kingdom Building, has a few nice new rules - new buildings, new events - as well as everything that you know and love from earlier products. It is well put together, easy to read, and flows in a logical way. This section, however, has the one major drawback of the book - namely, the "Kingdom Events" are connected seamlessly to earlier sections. I would have preferred that the material be presented in multiple chapters, so that I could give the Kingdom Building crunchiness to my players without giving them all of the events as well. This could be solved by printing the materials but, as another commentator observed, the thick black borders making printing burdensome.
Finally, there are a few pages worth of player handouts. Again, these are things we've seen before, but it *is* convenient to have all of this material in one place.