I have used it on and off in the past, mainly this time to see if it helps with boosting progesterone levels (I've had 3 MCs, I haven't had the issue investigated yet, but am trying Agnus Castus to see if it helps). It's generally good for female menstrual health either way. Incidentally I apparently have a fibroid and AC is supposed to be a natural treatment for this, according to some sites I was reading).
I only use the liquid form, by Bioforce / A.Vogel, as I trust this brand 100%. I wouldn't be so keen to try the tablet form by another brand, as I wouldn't be sure if anti-caking agents etc. have been added, which could cause issues unrelated to AC.