Joy is a wonderful host, proactive and with quick answers.
It was better than I expected, due to former experiences with other owners.
I do have a single remark, something that I didn't realize from the pictures. The apartment is actually only one room, meaning the bed and the kitchen are in the same space :) Not a bad thing from my side, as I visited a lot and didn't cook. Just wanted to make aware other people in the future, if they have different needs.
I sure recommend Joy's apartment, it is near to a subway station (2 min) and 15 min walk to Central Station.