Hi Sharond,
I lost 2 stone in around 6 weeks a few years a go. It is hard work the first few weeks but the weight does drop off quickly. It has changed since I did it. I just had shakes or bars. I think they have soups and food now. If you want a quick fix it works but I'm not sure its the best way to lose weight. I kept the weight off for over 2 years until I fell pregnant. It is expensive but it was the only food I had so it worked out ok financially.
If you are going to give it a go then good luck. Drink lots of water and I also had a sachet of Fybogel a day (for obvious reasons!).
Kate x