I'd say go for it! I find his stuff to be VERY effective.
I myself am on Day 20 of Master Cleanse, and have been doing
the Bowel Cleanse as well. I have passed an astounding amount of the Mucoid Plaque. Never, in my wildest imagination, did think I had so much junk in me. What a relief to get rid of it ... including undigested "hard-pressed" tablets that I've been passing as well, that I stopped taking 14 days ago.
Just be careful to follow the directions carefully. Particularly the Colon #2 ... 4 to 5 times per day, but I've added Pysllium Husks caps as well. 4 caps everytime with #2. Don't forget ... Lots and Lots and Lots of distilled water.