No matter what you use for what situation. What do you use the most and why? 
There is no one best phero product that works the best for me in all situations.
A simple product can however give you mild enhancement for many situations but you might find them a bit lacking when you really want to turn up the sexual heat and might find them to be a bit much when you are in a strictly professional environment. One such product is Ammo.
When she’s on the rag and being a hag, ah reaches fo’ A-1. Ah soon be gunnin’
where da sun don’t shine.
Ammo, A314, Instant Shine, Instant Female Magic from the Androtics line.
WIN. Thread is over.
I agree with everyone here, during period use Instant Female Magic (or when they are upset), works like a charm. I would try to avoid anything with high -none like Ammo, TUTH, etc during these days, it may get them nervous or upset.
I’m guessing that you are asking what my number one product is. As in, if I had to choose one, and only one, product what would it be?
On a selfish note I would go for Instant Sexiness A because it makes ME feel great.
But on a sensible note I would go for Instant Shine, simply because if everyone around you is feeling good it will certainly also make life and getting things done a heck of a lot easier.
However, I still have a lot of products to try yet! 
Best
May
you got it…