Well it has been discussed a lot recently
eg:
And as for my experience - IJ is a very very polarizing phero, which will create agression, revulsion, competition, avoidance and mistrust in a lot of people around you, it can trigger fights and face-offs but when it hits, it hits awsomely!
To someone attuned to an IJ sig, the agressive none confidence/cockyness and very forward status/raw sexuality of five times the amount on none compared to any standard Instant makes it a remarkable product.
You just have to accept that it is going to alienate at least as many as it may attract.
And lastly, IJ is the very last phero I would consider for daytime, unless you are immersed in a relentlessly macho, agressive and competitive environment.