I've got about 15kg's to lose, but I've come to a complete stall and am lacking the motivation to get back on the diet. So i've been thinking about doing something like optifast with the shakes for a week or 2 to get me out of the cycle of eating bad stuff, and then I can carry on with weightwatchers.

But do they work? Will I be absolutely starving on them and not have the energy to look after the kids or go to the gym? If you've tried them, please give me your pros and cons!