Stayed at Shin's apartment with my boyfriend, it was very spacious and you could comfortably open 1 medium + 1 large suitcase in the apartment. The location was very convenient and accessible via train with the walk to the closest line about 2 mins. If you are coming directly from the airport, getting there was easy. Shower was functional and worked fine.
In terms of the wifi connection, you will get much better service if you move the pocket wifi near the window when you are inside the apartment.
Overall wonderful stay!
Thank you for hosting us Shin.