Hard to ever feel completely cured. There's a weakness we've developed that will always be lurking around on some level. Two separate times when I've cleared one year of no PMO it gets to the point where it's pretty far out of my mind and everyday life. There are still other things that might degrade quality of life such as bad eating / drinking habits or poor use of time. But PMO makes quite a potent form of shame and stagnation which is nice to have out of the picture. Yet I relapsed both those streaks so was I ever completely cured? Will I ever be? I don't know. I'd say 90 days is a good length of time to get to jump in quality of life and then 1 YR is another good checkpoint.