That's the key, *IF*. My s-i-l is on her second one. She didn't follow it right and it didn't work.
IF these people chose to stick to a health plan, they wouldn't be lard a$$es today! Living healthy is simple, but not necessarily easy. If you burn more calories than you take in, you will lose weight. It requires healthy eating habits, regular excersise and will power.
Have you ever noticed that the people that troll through parking lots looking for the absolute closest parking space to the store's entrance are many times overweight and out of shape? They park as close as possible, waddle into the grocery store, hop on the electric cart and motor over to the Twinkie aisle. Common sense tells me that this may have something to do with the fact that they have the figure of a Hershey's Kiss.