I've found it to be helpful at births if something happens out of the ordinary, either too fast of a labor or something like needing to transport, etc. It's good for when everyone is on edge and feeling so tense that they can no longer think straight. I give, or suggest, that everyone involved take a dose so the vibe of the room and come down a few notches. I used it myself too during my labor (exactly one year ago today) and it was a great help, to me, my dh and my doula.
I also keep a bottle in nearly every room in my house for nightmares, injurys, freak-out crying fits, etc. I used some in Target yesterday when ds totally lost control and started to have a fit for no reason, I just wanted to get my center before I rushed out of the store.
I think it's a miracle!