Summary: Because of the pressure to get additional procedures and the factory-style plastic surgery clinic feel, I don’t think I’ll go there again... If you don’t like clinics with this kind of vibe, I don’t recommend it.
I did see good results from square jaw Botox. I’ve had it done at several places (2 places in Seoul, 1 in Suwon), and I think the square jaw Botox I got at Mikey had the best effect! However, it really felt like a factory-style plastic surgery clinic mainly for foreigners, and I only wanted to get square jaw Botox, but they talked as if I absolutely had to get additional procedures too, so I remember having no choice but to do them...