I have received square jaw Botox 3 times, once every 6 months. Originally, I had a lot of muscles in my chin, so the doctor said I could expect the effect to be good. It definitely had the effect of making me look slimmer, and my chin muscles didn't protrude when I touched them. But it felt like my nasolabial folds were getting worse as I got hit. ㅜㅜ These days, the square jaw doesn't seem to bother me too much, so I've stopped doing it. I haven't had it since I last got it in March of last year. If I change my mind, I might go get it again.