Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good, but overhyped

Monty Roberts writes a good book, but he claims to have originated too much. Competent trainers have been quietly training horses for the last century. John Rarey, author of "The Rarey Method of Horse Training", was doing this sort of thing around the turn of the century. Patti Hughes, in California, does it today. Admittedly Roberts' techniques are in contrast to what Vicky Hearne ("Animal Happiness") once called "what passes for training on California racetracks", but they are not at all unique to him.