I successfully lost 50 pounds with NutriSystem and lots of exercise. It was great, I was single, the center was around the corner from my house and I liked the convenience. I successfully kept it off for over 5 years, until I stopped all the exercise and did not make the appropriate changes in my eating.
Any program can work if you work it. Good luck. I just wonder on the importance of the weekly meetings, I looked forward to mine, of course, I lost 2 pounds every week for 25 weeks, no lie, just like a clock. Doing the program on line will work for some people who work the resources of the site.