Which areas in Seoul do international visitors prefer for their beauty trips?

Hello everyone! I'm Hanh, from Vietnam, and I'm planning a trip to Seoul next month to try out some beauty treatments. I've heard a lot about Gangnam and Apgujeong, but I'm not sure which area is actually the best to stay in.

Do any of you have experience in these areas? I'm curious if there are any differences between Gangnam, Apgujeong, and other areas, or if they're pretty similar. And what about accommodation, do you usually choose Airbnb, hotels, or something else? What's a reasonable budget for accommodation?

I'd also like to know which area is most convenient for getting around, has plenty of good restaurants nearby, and what it feels like to stay there long-term. If anyone has scouted out quality spots in these areas, I'd love to hear some real-life advice! Thanks in advance, everyone! 😊