Information on Isagenix 9-day cleanse?

So i'm planning on signing up for the 9-day cleanse initially then buying extra shakes to replace some meals every once in awhile. I'm not doing it for weight loss, I'm doing it for overall health (glowing skin, cleansing of toxins, slowing my cravings of junk food) although a little weight loss happens to go along with it. It's a lot of money, so before I buy it I was wondering if anyone had a negative response to the program? All i've heard and witnessed is good things so I wanted to know if there were any bad stories at all.