Great location if you fly from both airports and most likely to travel around Tokyo and surrounding areas via subway. Have 3 different convenient stores within 500 meters. This place is in a walking distance to Asakusa.
The room maybe has too little space left for 4 persons since 2 beds take up lot of spaces. All commodities and facilities that you would need for your stay are mostly provided. The owner responses very quickly. Her guidebook is very resourceful and make you trip super easy.