Nutrisystem Diet Plan

I read from a magazine that a few well-known celebrities are on the Nutrisystem diet plan. But does nutrisystem work effectively on a long-term basis? I don’t think that a diet plan will work effectively on a long-term basis if you don’t watch what you eat and if you lead a sedentary lifestyle. I always believe in eating everything moderately, eating up to 70% full (never 100% full!) and EXERCISE regularly.