It was a great place that was convenient (2 mins from Shinjuku 3-chome stn) and had more than enough space for one.
On the flip side, it’s prime location also means that it might get noisy at night/wee hours of the morning, which was the case for me even amidst covid. Also, there’s no lift so do be prepared to carry your bags!
Overall, I enjoyed the place and the host was extremely accommodating and quick to respond!