PROS: The location is great because it was close to the places we wanted to visit (SkyTree and train stations). There was a pocket wifi available for use in and out of the apartment. Satoru seemed really nice during the brief encounter. The apartment had cute Japanese decorations that made the place look beautiful. CONS: This is more of an apartment than a house. We are a family of 4 (2 kids, 2 adults) and we were quite cramped especially with 3 suitcases. The only warm area was the bedroom. The bathroom and the small living room area was quite cold, including the toilet seat (brrrr). On the day we checked out, the water heater stopped working and we decided to forgo the shower until our next destination.
Overall, I would recommend Satoru's place for a short stay in Tokyo or for 1-2 people.