We had a great experience at Sei's house. Spacious and comfortable, with plenty of space to spread out, relax and cook meals.

The apartment isn't really within walking distance to a Tokyo Metro station (at least not that we could find), but it's a pretty short walk to the JR. If you have a JR Pass during your visit, you can ride the Tokyo JR trains for free, and they connect to most of the major areas you'll want to go, or at least get you close to a metro. We didn't have any problems.

The back balcony was a great addition too, air conditioner worked great, and the neighborhood is pleasant and quiet. Plus there's a cool market near the JR. A great neighborhood we were happy to retire to that we wouldn't have explored otherwise!