I'm certainly no expert, but when I looked up the common ingredients in over-the-counter laxatives, the main ones were Senna & Cacsacra Sagrada, which are in other colon cleansing products, such as Colonix, Bowtrol, and Dual Action Cleanse. That is the main reason that I don't want to try any of those products, because those specific ingredients have been linked to long-term bowel problems.
Oxypowder doesn't contain any of those dangerous ingredients, which is a plus for me, in my opinion. Also, another thing that turns me away from Colonix, is that you have to mix a bunch of stuff and drink it during the day. Like you, I am a very busy businessman. I have a company to run, and I do NOT have enough time to mix all of these teas and shakes together, especially for 30-90 consecutive days. That's too big of an inconvience for me.
As for experience, I will be completely honest with you, I have not tried any of these products, so I can't tell you if one is better than the others. I am merely reading over the info posted on both products websites and then comparing it against the other. So far, Oxypowder's website has tons of information about their product, ranging from Ingredients, Clinical Studies and Testimonials. A whole lot more than Colonix.
But, like I said. I don't know much about these products. My first impression is that Oxypowder is more impressive than Colonix...