Jackson HATED the spray... he would completely wig out, lol. Little spazz. That's why I just sold it and I bought the gel instead. He likes it MUCH better. He didn't really even put up a fight with me rubbing it on his mouth. We used the spray maybe twice but the two times we did... he had a little yellow build-up on his canine tooth, we sprayed it, and the next day it was gone! Worked great.
Plus, his breath smells really good! I'm mostly using it as a preventative because his teeth aren't bad but I'm really satisfied with it.