My gf's parents both lost over 50lbs with it.
The shakes are delicious, but I didn't like the system. The shake powder is full of sugar, it just isnt healthy, and you need to add protein powder to make it keep you full. It is also super expensive. If you are thinking of trying it, you should sign up as a distributor- you get at least 25% off.
Their vitamin line is pretty solid - but, again, super expensive.