My lip shape was a complex for me, and I was upset because filler only seemed to make me look like a duck's beak, and then I found out about this.
I thought it was a simple procedure because it was a type of thread lifting, so I did it lightly, but for several weeks I looked exactly like the Joker. Please make sure you leave enough recovery time T_T
It was not a complete smile improvement as much as I had hoped, but my mouth shape changed so beautifully compared to before that I am satisfied. I am not sure if it is cost-effective.