Yim's House is also called Yim House. It's run by two brothers and the son of one of them. it is located in a quiet alley off the main road. There are one or two small lodgings nearby.
The location is ideal for visiting three of the four main palaces in Seoul. One is five minutes walk away from Yim! The Insadong tourist shopping mini-village is close by. Many nice souvenirs, and some serious (not tourist) calligraphy and brushes. Good choice of Korean food.
My room was super clean. Yim House is a small place, and the room was small. For one person it is enough. For two people, you can have two twin beds. But the room may be cramped if there is a lot of luggage. Wifi and TV, a fridge is provided. The place is well maintained although not fancy. I was most impressed by the cleanliness of everything, especially the bathroom. Please note that my room (by choice) had a shower which (as in some European places) did not have a stall. The whole bathroom can get wet. A room with bath tub and shower is available in other rooms. I preferred the wet bathroom.
You can hire their car to go back to Incheon Airport for around 70-75,000 Won. Good deal. Subways are nearby, about 10-15 minutes walk. From that you could switch to Seoul Station and transfer to the line which goes all the way to the airport.