I lost 9.5lbs wk 1, 5lbs wk 2 and 4lbs wk 3 - I STS this wk but was so constipated I'd not been to the loo for 6 days (sorry but it was bad) I've lost since Monday and its a fair bit so its def not the bars hun.
Some people avoid them as they think that they can trigger off the urge to actually eat which you dont get from the soups and shakes - I personally have no problem at all and always have mine with a huge half pint of black T xxx