K&K are great hosts and the place is clean and all daily necessities are available. K&K constantly message us to check that we are doing fine at Tokyo and they responded to our messages instantaneously. When we message them in the last minute on whether we can check-in earlier than the 4pm check-in time because we arrived much earlier than expected, they responded positively immediately!
The apartment is only 1 to 2 minutes walk to the Kita-Akabane station and it is a direct line (Saikyo line) that is only 15 minutes to the famous Shinjuku area. There is also a "Life" department store within a minute walk from the apartment, where we can conveniently purchase anything that we need.