I did a 22 day Master Cleanse straight by Burroughs' book last May / June that yielded fantastic results, and was a jump start for a radical change in my eating habits. If you click the link to all my posts, you can read what I've posted about my journey.
In August, I decided to do a second MC. I knew that I also wanted to do a bowel cleanse, but I had a time constraint with my upcoming schedule, so I decided to try the Ultimate Cleanse. I ended up doing 8 days on the Master-Cleanse straight, followed by 8 days of the UC, and ending with another 4 days of Master-Cleanse straight. I believe I posted a few things during that journey as well.
I did do the B&P as outlined in the PTree post Pepe refers to... taking the B&P one hour before drinking lemonade and NOT *with* the lemonade... drinking LOTS of water... and I only did the bps twice a day - first thing in the morning on an empty stomach and last thing at night. WITH LOTS OF WATER.
My results were good - passed mucoid placque and ropes... had a problem with constipation one day, but once that passed, I was fine.
I definitely recommend, if you have never done The Master Cleanse before, that you do it the first time straight by the book. It's a wonderful experience in and of itself, and works wonders physically and mentally. It's my opinion that you should have that experience before you try the UC.