Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not realistic.

This book could have been written in a more organized manner. Also, the diet is better as a weekend detox, than a three-week diet as most of the people who do it for three weeks feel weak and dizzy. The author claims they feel weak and dizzy because of past issues; I doubt that. Most people feel week and dizzy from NOT EATING. I don't think people that have to work will be feeling well and there might be some sick days used up from this nutty diet.