Meal replacement schemes are not usually good for long term weight loss; they impose a temporary change on diet, after which people usually revert to their old habits. Diet schemes like that all try and avoid confronting people with the unpalatable truth that they need to make permanent changes to their behaviour (because many people have an aversion to paying for uncomfortable news).
Changing the subject...
After all this time, I still occasionally use the Wii Fit programme for a reality check and comparison with past standards. While I value its accuracy and history, I'm wary of some aspects of the programme. It's still insisting that I should aim for 65kg (10 st 5lb, BMI of 22.0) as an ideal weight and refuses to consider any other kind of health goal (e.g. improved stability). Well, at 71.5kg (11st 4lb, BMI of 23.92), I know I want to lose two or three kilos more, but not 9. Anything under 68kg (where I was before I started strengh training) really is not healthy for me and I'm not impressed by software which cannot be diverted from an obsession with a pinpoint ideal based on results averaged from a huge sample population; there seems to be no way to point out to it that, since I am in its "ideal" band and have been for most of the last three years, that it should offer me other options (which should be easy, given how much data it tracks). The fact that this software is aimed at people considerably less fit and informed about health/fitness than I am makes it all the more worrying. I see people I know on various cycling forums drifting into anorexia as they become just a little too focussed with goals and weight management, crossing the line from perseverance into obsession. These people tend to be well informed about health and fitness and yet they succumb; how much more vulnerable might the less clueful typical target of the Wii Fit be? This very clever piece of software uses all the goal/reward hooks learned by the computer games industry to entice people to lose weight, but also nags them to weigh themselves every day and, though it tracks strength, balance and agility gains, only really cares about calories burned and weight lost.