When I stay on the program, it is fine.
I have been on the 17 Day Diet since February of 11. I went from 210 to 178. That was the lowest I have been since I was a freshman in High School (I'm 55 now). For now, my weight has drifted up to about 185. I have been on Cycle 4 but have made the mistake of trying my own methods and that has caused me trouble. The fix for me is to always just go back to the principals of the 17 DD and things get back in line quickly.