Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Confusing at best

I've seen chapter 14 of this book referenced (by a university professor giving suggestion to his students, not by a random guy) as:"Another conventional approach to strength reduction. 35 pages of the same kind of confusing crap we've all come to expect from this book."This could not sum it up better. A confusing book at best, presenting basic material so as to make it look "advanced", and without any covering of even relatively new techniques. A good source of references to papers that you should read, but not at all a valid reference on its own.