Smooth Sailing's a great value for the space. It is walking to several good, local restaurants & coffee shops, as well as Ueno Park. It's ~10 minute walk to both the Iriya Station (metro) & Uguisudani Station (JR train), and ~$5 taxi from Nippori Station -- one entry point to the city from Narita Airport. Our host also provided us with detailed directions, including photos, to the apartment from the airport, if you prefer to forgo the taxi.
Two separate bedrooms was ideal for sharing the space with friends. Space was fully stocked with bathroom needs and laundry detergent. Any other necessities could be purchased at the 7-11 across the street. Aiko has a washer on-site, but there is also a 24/7 laundry mat across the street if you need access to a dryer.
Aiko was incredibly responsive to questions. I'd highly recommend Smooth Sailing, especially if traveling with friends or another couple!