We have stayed in kazumi 's place for 10 days. The area is quiet and as mentioned in his ad, it is very near to subway station (i.e. nishi-shinjuku gochome) with a lot of kombini around. The appartment is exactly identical to the provided pictures. Plus, the pocket wifi was provided which I consider a must have when travelling in Japan. We went out of Tokyo for a couple of days and when we came back to his place, the shower couldnt provide hot water anymore due to the heavy rain. So we've notified it to kazumi who has rapidly clear the issue. He gave us tickets for "senton" (really near to his place) while he was dealing with the hot water and offered us a box of treats to appology.
Kazumi and his girldfriend are very kind host. And his place and offer constitute a really good deal to not miss if you are looking for cheap and convenient place to stay in Tokyo central area.