Colon Cleanse - Does it Work?

I've heard and read about celebrities using these colon cleanse products to jump start their weight loss. Has anyone else tried these products and successfully lost weight? Or is it just like any other diet wherein you do lose weight for the first month but then you gain it back after a while. I'm also wary of using these products for fear of any side effects it might have. I know there are a lot of websites like http://www.coloncleanserreview.net with reviews on different brands but I would rather hear it from someone who actually used it.