Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unless you have or inted to buy a Garrett

Unless you have a Garrett or are thinking about buying only a Garrett detector this book is of little value. Thinking that this book would contain valuable information from one of the industry founders I was excited to purchase. From the start the author says he has a love for Garrett detectors and the book is meant to advise and help in genera and not push one brand of detectors. However throughout the book the Garrett detectors are pushed and referenced as the best choice. There is little reference made to any other brand and the book gets very specific as to utilizing Garrett devices. I found the book to be little value as I had not yet purchased a metal detector and really wanted to learn in general about the hobby from one of the greats... While there is some good information concerning general metal detecting I found the majority of the book giving praise to Mr. Garrett and really just a long sales brochure for Garrett detectors. Disappointed.