Be careful. I see the ad you are looking at and above it it says "Ads by Google" which means that Google put the ads there, and HealingWell.com does not necessarily endorse that product or website. In fact, I'm quite sure the forum does not endorse any of those sites/products, but rather sells ad space to Google who puts in ads that match up with the key words on this forum.
I think you'll find most of us on here don't really believe in colon cleansing products. Doctors usually don't endorse them. If you have D already, why give yourself more? That's my stance, anyways. And if you are constipated and need a cleaning out, ask your doctor if you can't take the go-lyghtly or phospho-soda that they make people use before a colonoscopy. You can buy both of those things over the counter (but make sure your doctor thinks it's okay for you to take them and make sure you don't used them too often); I'm sure both of those things are cheaper than a colon cleanse and anyone who's seen the pictures of their colonoscopy can tell you that those products more than get you cleaned out.