If you're looking to have the ultimate K-TOWN experience with everything within walking distance to you, THIS IS THE PLACE!
Pros: Location, location, location. Safe. Includes parking. The hosts are great communicators. The apartment is very clean. Reliable wifi.
Cons: Not many, but as a tip for larger groups I will say bring either an air mattress or sleeping bag(s). We had five girls in the apartment, and while there is definitely more than enough room for the five of us, the only two people who got a good night's rest were the two sleeping on the actual bed in the room. The roll-away (although very convenient and a nice touch) and futon were uncomfortable, with the futon not being large enough to sleep two small girls comfortably (they ended up moving to the floor). Also, if you're planning to sleep in, sleep in the bedroom because it gets pretty bright in the living room.
All in all, an ideal place for two people, maybe three. Any more than that, make sure to pack accordingly.