The apartment is situated a little bit outside the touristic centers, but we appreciated to be in a more calm and authentic area. Underground station is 15 minutes away, and deserve very well much places in Tokyo (among others it's a Yamanote line station). There's also a nice and relaxing park/garden 15 minutes away.
The apartment has got 3 rooms to sleep, a living/room and a private balcony. It's not really new inside and the beds/matresses are separated in two parts, but it's still a quite good value for money, and big enough for at least 6 persons.
Ayako is a very nice and reactive host.