OK I got a sample of this, and tried it last night, and found it unpleasant. Kinda compelling but unpleasant. I think it would be good to keep fleas off the cat? It smelled like citronella and pennyroyal or something, very sort of vibrating-green-loud. I fell asleep before the vanilla, and there was no smell left in the morning, it may get better over time but I personally would not be able to wear it.
Definitely try it before buying!