I also am a refugee of other diets, so much so that I could no longer lose on any of them and thought I had ruined my metabolism forever. Then I discovered Medifast, and even though I do lose more slowly than most (because I really DID mess up my metabolism), I have been losing consistently for nine months and am down nearly 50 pounds. I also have more energy than I had on other plans, and haven't had so much as a cold since I started!
The first couple of days I was very hungry, but that passed. And in the beginning I didn't like a lot of the foods, but I've learned to doctor them up and my tastes have changed. I still refuse to drink the shakes, but I've found plenty of other foods to have instead.
What I like: steady weight loss; more rapid weight loss than on other plans (even for me); having extra energy; not having to constantly think about what I can eat and plan my meals, and not having food be the focus of my day; knowing that I'm eating only balanced, nutritious meals; learning to eat small meals throughout the day; learning to actually LIKE vegetables; this forum and all its wonderful support; my Health Advisor and all HER support; unpacking my box of goodies every month.
What I don't like: the shakes, and that I didn't reach my goal (75 pounds) instantly.
As for maintenance, I'm not there yet, but that was my biggest concern when I started. I've lost the weight before and I know what it's like to gain it all back (plus some extra). I know more than 90 percent of dieters gain the weight back. But I truly believe that THIS time I can be in the small percentage who don't. I can see using the Medifast products for the rest of my life (not all day, every day, but as part of my normal routine). I also have found that if I DO slip up, it's been very easy for me to get back on the program, so I think if I did gain a few pounds, I could easily do a week of the full program and be right back down.
I don't mean to sound like a commercial, but I've been on this thing for quite a while now, and I've seen it work for a lot of people here. And if it can work for ME, after nothing else would anymore and I'd all but given up, it can work for anyone.