A friend of mine is contemplating trying this diet. Apparently it is taking Britain by storm (I must have my head buried in the sand somewhere because this has passed me by).
Basically you live off a concoction of maple syrup, lemons and cayenne pepper. I'm not surprised that one loses so much weight. Would most of the weight stay off if you ate healthily afterwards though?
Just seems to be another extreme diet to me. I'll stick to eating healthily and exercising.