I actually had 3 years free of sugar and whites with basically no real cravings, on RR. Until I got pregnant with my youngest and something changed in my body, my severe gluten intolerance kicked in with all thiose delightful symptoms, and it all fell apart.
I tried going back to RR and did stay sugar free for a while but never felt steady. My blood sugar was uncontrollable and cravings kept coming. In the end I couldn't hold out, I guess my motivation did weaken as well as I could see it wasn't working. So I started looking for more information that could help me sort it out. And found my way to gluten free, then dairy free, and then paleo.
I don't know if I'll ever feel that steadiness that I had during my 3 years sugar free, but I'll keep looking for answers.