I think that the great thing that CD, LL, or and VLCD gives to you is the "awareness" of what and why you are eating. Once you have that and you can work out if you are wanting to eat due to stress, boredom, lonliness, sadness etc then you can talk yourself out of it because you know that it is not really food that you need. Food is just the mask you are choosing to hide the problem, and it will not solve the problem at all - it will be still there when you have digested the food (that you did not need

).
Eating for a celebration is fine - it is just eating for other "invalid" reasons that we need to be aware of and control. If we can do that, then we have the weight issue cracked.
I think anyone will agree that if they put on weight after losing it is because they ate the wrong things at the wrong time for the wrong reason. I know that I did. I was made redundant after 23 years and that made me turn to food. I knew what I was doing, but I still did it. I paid the price, but am dealing with it now. Luckily for me I caught it at 2 st, which is not so bad considering I lost over 7 st!!
Awareness and self-control ....... oh, and water!!