I received a procedure consultation at ATOP Beauty Clinic, and the hospital facilities were neat and clean.
I asked about improving lip asymmetry, and they said they could try to match it as much as possible with filler, but that it would be difficult to improve it absolutely perfectly. They also said 1 cc would be enough, and overall the consultation felt conscientious and honest, which was good. (I did not get to see the doctor.)
There are some reviews saying the filler fades unevenly, but I feel like that may not be something the doctor can control, so I am thinking of trusting them and trying it once.