I went to 4L Clinic in Jangji-dong for a CoolSonic treatment to completely refine my facial contours. I'm someone who cried on the way home after getting Ultherapy in the past because it hurt so much, so I was looking for something that wouldn't hurt at all costs. The CoolSonic at the Jangji-dong clinic was seriously not painful at all, which is ridiculous lol. Since it's a pen-type device, they worked on my jawline, side cheeks, and even my double chin with incredible precision and thoroughness, so I'm extremely satisfied. The director strongly recommended CoolSonic, saying Ultherapy is outdated these days, so I trusted them and lay down. Since it wasn't painful, they significantly increased the energy intensity, and as soon as it was over, the feeling of my skin being pulled up was incredible. There is absolutely no swelling, so I can return to my daily routine right away, and I can see how clearly my jawline has been defined every time I look in the mirror. My skin elasticity has improved, and the taut feeling is amazing. Lately, people have been telling me my face looks smaller, so my confidence is skyrocketing. The value for money at this Jangji-dong clinic is insane, so don't hesitate and just get CoolSonic, please!!