How about Cheongdam Mezzanine Clinic?

I'm looking into it because a beauty YouTuber highly praised it, but it seems like everyone in the know knows about it, and that celebrities also go there. There's a lot of talk but really no reviews...ㅠㅠ The price is usually three times that of a regular dermatologist, but they're all booked up lol. What is this..?? If you search for it, it's all secret postsㅠ No matter how much you do, how can it be this mysterious?? It's so surprising because there's really no information... I went on the hospital's Instagram, but there aren't many followers, and the YouTuber is tagged in every post, so I can't tell if it's viral or because it's just a place where celebrities really go. Judging from the YouTuber's review, the effects were crazy, but if it's real, I'd like to go, but I'm nervous because there's so little informationㅠ It's not cheap,,