I must admit that I have had a lot of frustration using this book. Many of Mr. Berle's riffs and excercises are presented without much context, other than an explanation that the riffs are pulled from this chord or that scale, plus chromatic notes. Thus, it sometimes feels like Berle's book is another in a long line of "play the notes of this scale, in some random order, over this chord" instruction books.
However, I think that this book's problems stem more from the scope of the task that the author has taken on. This is essentially a book for beginning jazz guitarists. Given the difficulty of playing jazz, this is not necessarily a book for beginning guitarists, unless conversant in some other instrument.
This book does not undertake to give a thorough explanation of chord voicings, melodic or harmonic theory, or thinking in a modal or non-functional context. For a better understanding of these elements of jazz, you need to seek out more advanced resources. This book undertakes only an explanation of spotting the diatonic key centers and playing the "correct" notes over a few choice examples of standard jazz changes. This in itself is a significant task, especially since Berle attempts to break down the subject to a level that any relatively intermediate guitarist could understand.
I would recommend this book if you have a smattering of theory and a desire to start learning jazz. For a very good all-purpose resource on jazz theory that covers a lot more ground, I would recommend Mark Levine's the Jazz Theory Book.
If you are not a music reader, don't let the lack of Tab put you off of this book. Berle clearly diagrams every position, and each note has both finger and string indicators. This may be one of the best resources for you to start learning to sight read, and you will need that skill if you want to use the more advanced resources on jazz playing, particularly those that are written for all instruments. The resources in this category include The Jazz Theory Book, the Aebersold series, and Building a Jazz Vocabulary.