Instruct: Classify Amazon reviews into positive or negative sentiment
Query: brilliant

The depth and breadth of Hall's material is staggering. He's pulled together concepts from a variety of sources and successfully integrated it into his meta-states concept. As said by another reviewer this is not a introductory NLP book; it is however, considered an introductory meta-states book. Unfortunately, most of Hall's works are not user-friendly and this is no exception. It's poorly organized, formatted and editted; it can be difficult to read at times. DESPITE all this, the uniqueness and power of this book's concepts is well worth the trouble.