"great so far! i have used this for four months and only experienced slight breast tenderness in the beginning. i am taking this for bc (of course) but also for stage 1 endo. it has been a godsend in that regard- my periods are so light, i can get away with just a pantyliner when i used to have to do a tampon and pad. my cramps are slight on day one and then gone for the rest of my period. i cannot describe how wonderful that is in comparison to the excruciating pain i used to have. it would have been great to get bigger boobs from this but alas, nothing is perfect ;) try this for sure if you have very heavy periods, very strong cramps and endo in its beginning stages."