Good
Communication
Young was very responsive and answered all our questions quickly through WhatsApp and Airbnb. The process was really easy and quick
Check-in
The check-in process was really easy and clear. Again Young was really helpful in this process
Space
There is a lot space in the apartment compared to other places we were looking at. This was really nice if you are staying there for a long period of time.
Bad
Location
It is hard to see where exactly the apartment is in from the map settings on Airbnb. The apartment is around a five minute walk from the Wakamatsu-Kawada Station towards the Shinjuku central area.
Sleeping
You are basically sleeping on 5 or 6
mattresses stacked on top of each other. I found it pretty unsteady and did not like it.
Wi-Fi
The Wi-Fi speeds in the apartment was quite poor and I would not rely on it based on our experience.
I am sure Young will fix these issues in time for the next person but did want to highlight these points.