The Complete Idiot's Guide to Understanding the Talmud is probably worth reading for the concept alone: a basic introduction to a subject so complex that it basically defies any attempt to summarize it in any meaningful way (this book probably rates right up there with The Complete Idiot's Guide to String Theory when it comes to the audacity with which it attempts to dumb down the essentially un-dumb-downable).
The book is, overall, a fair introduction to its subject matter. It lacks the scholarly rigor of Adin Steinsaltz's The Essential Talmud, but does a decent job of capturing the spirit of the Talmud and enticing the reader toward a closer look at what is probably the world's most complex (and fascinatingly weird) religious text. Rabbi Parry seems to adopt a fairly literalist approach to both Talmud and the Tanakh, but even non-literalists can read this book without being put out by such an approach, particularly since Parry does a good job of capturing the spirit of the mythos of the Talmud's presentation of halacha and aggadah. Nevertheless, some of Parry's idiosyncracies (his fairly non-skeptical approach to UFOs, his attempts to synthesize the Talmud's discussions of the natural world with science) may be distracting to some readers.
Finally, as with most books in the Complete Idiot's series, this book does suffer from a lack of careful editing. Typos abound, and the inconsistent (and sometimes downright odd) transliteration can be annoying (it is not unusual to find a Hebrew word or name spelled two different ways within a single paragraph).