Although we did not have a chance to meet Jin in person and exchanged emails only, we do admit she is a wonderful host. Her brother met us, and was very charming and attentive to all our needs.
The apt is on the 5th floor without elevator in the very center of the city. It has pretty much everything except for the washing machine (for those who stay longer then a few days as we did, it might be important). It's size is absolutely fine for 2 people.
The main disadvantage for us was a very hot weather (opening windows did not help a lot and after sunrise it was getting very hot in the room), and foremost is a loud street with garbage trucks starting from 6.30 am. Maybe we were that "lucky" but we had this noise from them and from some other trucks two mornings in a row. My husband did not complain a lot as he was tired and did not pay much attention, but it was very annoying for me.