Looking over the ingredients and what they have to offer, I don't think the shakes and bars are any better than SlimFast which can be purchased locally for a fraction of the cost. The pills are just stimulants, and many of the ingredients have potentially dangerous side effects. The products cost a lot more because of their sales methods. The claims are just hype.
If you do decide to take them, please make sure you see your physician for advice and monitoring.