I can understand why people do VLCDs, but it was never a real option for me - the thought of living on shakes/bars etc for months .... wasn't for me.
Thing is, to achieve a healthy weight and stay there for life you have to address the underlying causes of your overeating, which are both psychological and physiological. Personally I've found SW helped me to do that in a gradual, healthy way that's meant the things I've learned during the journey are now an everyday part of my life.
I'm not sure that VLCDs do that, although some are better than others in that respect. I read the Lighter Life section of the board regularly because so much of the psychology of eating is discussed there, LL actively encourages people to think in quite a deep way about their eating habits. It works really well for some, but as with any other approach, there are people who lose lots very quickly and then regain it all within months and come back to try again.
What's more important to you right now - losing weight as quickly as possible, or reforming your habits for life? This is what you need to think about. Decide what your priority is and take the appropriate action.