Its located near exit 8 of sadang station, literally a minute or two walk. This stations on Line 2 which connects to every hot spot you can think of.
My only complaint is that the area was really smelly since it was all seafood restaurants (but if you're like me you wont be home most of the day anyways) and its a private room in a FAMILY home thats currently hosting a girl in a different room. I feel this should be listed because this may not sit well with some. That aside YunHee is AMAZING. She was so flexible and kind. Her mother is also great.
The room was a decent size and the bathrooms shared. Room had towels, blow dryer, hanger, long mirror, desk/shelves, and more. They also made breakfast which I loved because I've missed Korean style breakfasts.