I travel to Korea often on business and due to our office location, I always stay in the Hongdae (Mapo-Gu) area. I have stayed in a number of guest houses over the years and there are many good ones, but this was the best to date. I stayed in a single private room with private bath which turned out to be a basically a brand new bachelor style condo complete with kitchen, Laundry, Bathroom and more right in my room, which was great!
Otherwise, very close to the shopping district, subways, American style breakfast (Travel Maker) and so much more.
Highly recommend this one!