I've not done this diet, but I do have to watch what I eat to maintain a reasonable weight.
Our Chiropractor features several eating plans. Core Plan, Advanced Plan. I generally eat the Advanced plan. It's for people who need serious weight loss or have chronic diseases such as diabetes, heart disease, chronic fatigue, cancer, etc.
Basically, kill all sugars and things that turn to sugar quickly. (and no artificial sweeteners either). including corn, potatoes, all grains, beets, peas.
Eat natural proteins -- grass fed, hormone free meats, poultry and fish.
Eat healthy fats (olive oil, coconut oil and grape seed oil. Raw milk and butter). Avoid damaged fats. Almost all others, and ALL hydrogenated or partially hydrogenated fats. Avoid canola, corn, sunflower, safflower, vegetable oil.
Beans, greens, squashes eggplants. All you want. Raw nuts. Raw salad greens.
You may eat ALL you want. I'm stuffed and loose weight.
The core diet is less strict and permits whole grains, the more starchy vegetables.
I really like the eating plan but it takes some adjustment to get used to it.