Losing the weight, however you do it, isn't the most important factor of dieting. Changing your lifestyle and the way and reasons you over eat is. Initially when you lose weight the fat cells don't disappear, they just shrink. It takes about 6 months of maintaining the weight loss for the fat cells to disappear from the body.
After you lose the weight, a strict 'maintenance' diet with regular exercise is key to maintaining the weight loss.
All diets will work for someone, but that doesn't mean they are right for everyone. Find the one that suits you, and stick to it, and remember to get off your butt.
Ms Waters