Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Be free. . . but don't believe everything you read

Snake oil? No, not quite. Ripoff? Nooo. Lack of research? Definitely!Mr. Love likes to drop names of singing stars to obfuscate his lack of research in physiology (and very little in anatomy). Why he didn't consult with ENT's or speech language pathologists is beyond me. His wild and absolute certainty about "middle voice" and its "zipper" physiology is unforgiveable when experts on the subject of voice like Sataloff, Colton, Casper and, Boone are accessible.There is so much that is wrong physiologically in his firm representations it would take another book to refute them all. Mr. Love should stay with the mental imagery he professess, such as imagining your exhaled air the color red, etc. When he leaves this domain and tries to explain physiology he runs smack into this thing called science.Before Mr. Love writes his next book I highly recommend he observe singing vocal cords via stroboscopy first.