Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Just Terrible

This is a TERRIBLE diet. After only a week on the diet I was very fatigued and sluggish. I had trouble functioning at work. I began to crave sugars and, after stopping the diet, ended up binging out on junk foods. Also, it relies on a lot of supplements that are manufactured by the book's publisher. Not only is this very expensive, but it's completely unnecessary and potentially unhealthy. I'm happy to be off the diet. Stay away!