Any diet with extreme calorie restrictions are nothing more than a band-aid fix. You have to ask yourself this question before you start any diet. How will it affect you once you stop. For most people they go right back to their regular habits and routines which is why the yo-yo affect is a common term used in this instances.
Change your habits and your body will reshape itself to reflect your lifestyle. Follow me if this is something you may be interested in learning more about, it is basically what I preach.