good luck with it. I have been that route, several times in several different ways. Yes I lost it, but here I am with a seriously messed up body from the yoyoing. For me what is important is that what I am doing is not only successful in the fat loss category, and healthy (makes me feel good physically), but that I can sustain it for life. Restricting calories to any degree for every single day of the rest of my life is not sustainable.
Ancel Keyes did a study on starvation, interesting. Someone wrote a book about it. Very good, and enlightening.