Site: http://www.nutrisystem.com/

Summary:

The main benefit of Nutrisystem is that they provide the meals (which taste fine). This teaches you what 1,200 calories of food looks like which helps you learn portion control. Very seldom do we see a meal and know how many calories in it. So when you follow their plan everyday you see what portions you should be eating, not just what portions are served and this is a skill that can last far past when the meals run out. They also have a lot of online tools to help  you.