I had orthodontic treatment 2-3 years ago, and I'm very satisfied now. I'll list a few pros and cons below.
Pros 1. I felt that the doctor had excellent hand skills, aesthetic sense, and taste. 2. I diligently followed what the director told me to do, and after about a week, although it was a difference only I could notice, I felt a change in my face. 3. The biggest issue, the clicking sound in my jaw when opening my mouth, also went away, and the happiest thing is that my jaw no longer hurts.
Cons 1. Distance! As the writer, who lives in Seoul and gets around on foot/public transit... it wasn't easy to get to Suwon by public transportation. 2. There are sooo many people. But for me, that actually made me trust them more. Even though it's not a hospital that advertises heavily, there are a lot of people? Even I went there through an acquaintance's recommendation, and I also recommended it to acquaintances...