I've been getting chin botox for a long time..
I get hit twice a year on average, and I try not to go over more than twice as much as possible.
First of all, chin botox seems to be effective only when the masticatory muscles are developed on both cheeks.
It's me.. It doesn't look like anything has changed, but the lines on my face have been tidied up a bit.
I think it definitely has a nice effect.