I have done the 30 day program twice now, with the second round (about a year after the first) being much milder. My dad recommended it to me, like he does many other things, but I checked out the website and saw some of the photos (they are graphic) of the parasites. With the possibility of them being in me, it was enough for me to try it.
I was 26 at the time and for the first 2 weeks much, much more came out of me than I put in. Like another reviewer said, I never had the sudden urge to go, but the first 2 weeks I was going 5-6 times a day, though never did I feel out of control. With week 3 at 3-4 and week 4 back to normal. At week 3, after I had given up hope, I saw my first parasite with 2 more to follow in the next couple of days. During this whole time and for months after my body "cycles" felt great.
I do have pretty bad allergies but I didn't experience any allergic reactions to the products like a couple of other reviews (sorry guys). I highly recommend you give this a go at least once. Make sure you follow the directions, drink lots of water and don't forget their stuff every morning! I drank the fiber mixed with orange juice, worked out well for me.