I have used Nutrisystem- I used it for approx 4 months and lost approx 22 pounds (which was my goal!) but as soon as I went off of it, even though I contiuned to eat healthy and tried to match the plan (only with regular food)-- I started to gain weight back- it's now been about year since I've been off of nutrisystem and I gained back about 15 of the 22 pounds that I lost. So, yes- it worked- but I'd have to stay on it to stay at my "goal" weight. I'm considering going back on a few months before the wedding- but I hope I'll be able to lose the weight on my own by increasing my exercise... we'll see.... I wish you the best of luck!