Question: Which area did everyone stay in during their beauty trip to Seoul?

Hi everyone! I'm Jing, and I'm planning to go to Seoul next month for a minor beauty treatment, but I'm completely unfamiliar with the area. I've heard there are many beauty clinics in Gangnam and Apgujeong, is that true? I'd like to ask if staying in these areas is convenient, or is it okay to stay elsewhere?

I'm mainly looking for a place with convenient transportation and good restaurants and shopping nearby, since I need a few days to rest between treatments. Has anyone been there before and could share their experience? For example, which areas have good value guesthouses or hotels, or any tips you could share?

Also, I'd like to ask how you find clinics—do you go directly or make an appointment in advance? I'm a little nervous because it's my first time doing this in Korea, so I'd love to hear your advice! Thanks!