I have been going since the end of September, and while I have not yet gotten a bfp, I do have more EWCM, and easier periods than before. I don't see how it could be addictive, its not like a drug or anything. You only do it if you feel it benefits you, and you are certainly going in order to get results. Its a kind of "therapy", so sometimes I think it takes a little time to work, but in my opinion, you can feel it working. It definitely brought ovulation on for me earlier this cycle.
I think its worth a try, if you are interested!