Just to add, I've not touched a CD shake for just under a year. I've maintained my weight within 2lb since. I worked the plans, but I'm no longer on any cd plan and havent't been for a long time!
I just eat three meals a day, snacks if I want to, and the odd day off. as long as you're sensible, then it's physically impossible to put the weight back on!!
I hate these articles because not many people report the good, only the bad!