If you are overweight your body can make up any calorie deficit with body fat. I also ate very little at first on this diet. After a while it does wear off. You get hungry. Your body won't let go of any more fat. You'll eat more and you'll have to find a calorie leve to keep from gaining weight. And if you need to keep losing, you'll have to employ calorie restriction somehow to keep losing.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Current squat: 160 x 2