Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too much theory - not enough practical information

This book does not deliver what i expected. IT is full of useless and dubious technical details. For its size the amount of useful information is very little. I expect to get something out from every book I read, and an investment of 5-10 hours to read this one, got me nowhere. Makes me wonder about the rest of the reviews. Reviews that and written from friends and are not impartial are plaguing amazon lately and i am very sad to see that phenomenon.