my sister is into big diets, loses loads of weight, then gradualy puts it all back on, then diets again, then gradually puts it all back on etc etc.
perhaps my idea of diet is different to others, I'm not bothered about losing weight, I just want to be fitter and healthier, hence eat less, do more. Eat whatever you want, but know that by eating, say fish and chips, thats n early start at the gym and I have to run there.
Re: Slimfast, the strawberry one is delicious and I have one for breakfast moat mornings, but only because its all I can handle at that time and I like it. It doesn't fill me up and its not that healthy really. If your "wife" wants to do a shake based, restricted calorie diet then diet mix from various supplement manufacturers is cheaper than slim fast.