I did. I tried Flex and then Core. I liked core much better. I ran out of money, though, so I don't go any more. I thought core was much better for me. I thought it was easy to do WW with C. The diet works really well with mass quantities of veggies and lean meats and fish. go fig, what we should be eating anyway. Low carb. It seems to work, but I have found a gluten-free bakery here that is thigh expanding great, hence my still not shrinking girth. WW works, but you have to tailor it to your needs. Both plans will work, you just have to do the research. I also have heard that one of the glorious by-products of C is a whacked metabolism. A friend of mine is stuck in high gear and has to eat 2k cal/day. I think mine is stuck in low gear. I think I could reasonable do 500 cal/day and still function pretty well. I also think there is another issue. My BP is great, blood sugars fabulous, heart rate is good, thyroid function is dandy (history of problmes on Mom's side, but I keep close tabs on it). In short, almost everything is great except I am still tired, oat-meal brained and still waaaaay fat. I don't get it.