Instruct: Classify a given review as either positive or negative.
Query: Most Successful Diet I've Ever Done!

I have been on numerous diets, only to feel terrible while on them, and only to gain back my weight within months of going off of it. This diet has been absolutely amazing! I've lost about 50 pounds in 4 months, almost effortlessly! The diet is very well-balanced; you don't cut any major food group (e.g., carbs). The portion sizes are a little hard to adjust to, and I found myself frequently hungry, but I adapted quickly. The exercise you must do is merely taking a moderate walk after two of your meals. I didn't even do the weight routine he suggests and still lost! The only drawback to this diet is that it takes a LOT of preparation time to make the recipes. There is also a great section on the psychology of weight loss and body image, which includes advice on how to avoid going off the diet. I highly recommend this book!