I've experienced far more problems than I expected.
My mother has some sort of perfume/smell allergy, and she reacts instantly if she is exposed to any flavored vape.
My brother complains that it sometimes smells terrible, depending on flavor and strength, even when he smoked 40 cigarettes a day!
My wife sneezes when I use liquorice, and sometimes remarks that my vape smells bad. (I'm a DIY guy, so it took a while to figure out, that it was the liquorice).
I have now ordered different flavors, and hope they will fare better.