It's very comprehensive, taking the reader from the simplest concepts right up to the state-of-the-art (in 2012). Very friendly, confident and (oddly enough for the subject), exciting! There's a collection of detailed examples, with code. However, unusually for Springer, it clearly wasn't proofread. Lots of repetition and grammatical errors in the text (the code seems solid). It deserves a second edition!
That said, I haven't come across a better book. I'd buy it again without hesitation, regardless of expense. Erlang is way ahead of other popular platforms for neural architectures.