I tried it and it has a high scent kinda like fruit cake.
It also numbs your cock too much to the point of you not even being able to feel anything.
I prefer stud 100 as I could still feel stuff, get hard and cum, just not too fast.
I put it on half hour before my appointment and wash it off before play as if you receive BBBJ it may numb her tongue.
China brush would numb things for much longer plus if you don't wash off before play, it has that high scent that women may mistake for hygiene issues.
As per celest's comments, sure with your girlfriend you might have all the time in the world but when you're paying money there is a lot of ymmv.
Many will not allow MPOS in a half hour session which I often book.
Many may not allow foreplay type activities like daty and digits.
Some will even hurry you up to cum as soon as your dick only starts to fill with blood.