Isagenix - Yes or No Thank You?

I'm thinking about doing Isagenix. It is hard for me to feel OK about entering into what I know is a "multi-layered" company, a.k.a. a pyramid scheme. On the other hand, a healthy smoothie for breakfast and extra energy throughout the day sounds really good to me. I can't find research on what this stuff actually does to your body. I've seen the before and after pics. Please - anybody out there who has tried it or knows anything about it - I would really appreciate hearing your thoughts....more