Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Use with caution

My family had a close association with the author Gladys and we observed the child-to-adult outcome in multiple families where her techniques were applied. There are positive aspects to the book but there is also an unmistakable dark side that may include a predisposition to emotional problems and substance abuse later in life. We observed significant emotional problems in more than 50% of the adult children where the parents relied heavily on this book.