Very large space for the middle of Tokyo. 2 beds, and a couch that can lay out to be a third.
Very rapid response from the host, and warned me when a typhoon was going to shut down pubic transportation in the area (which we would not have known honestly).
The building is also very quiet. We had an earthquake alarm (turned out to be false) one night and 15+ guest came out during it. If you had asked, I thought we were the only ones there.
10 min walk from Shinkjuku station which can get you anywhere in Tokyo. There's a smaller station within 2 minutes that can get you to shinjuku if you're tired of walking.
Was well worth the cost!