M.B.
I tried it and it worked for a while. I have a lot of weight to lose (over 100lbs) and I got reallllllly bored with the food choices after a few months. As with any program, if you stick with it, it will work. I can't attest to the power of keeping it off though. The best for me is weight watchers core program. I also need to exercise to lose! So I recommend a good cardio and weight training program. I have been able to loose 60lbs and keep it off with WW. Only lost 30 with Nutrisystem and gained it all right back as soon as I went off program. Good Luck!