If I had to describe this place in one word, it would be hospitality. Airin was very helpful even before I arrived to the apartment. She promptly answered my questions quickly and picked us up at the Sangenjaya Station. She made my first trip as a family enjoyable and successful.
As for the location, it was very nice to be able to feel the relaxed, young vibe Sangenjaya environment every afternoon after traveling through busy Tokyo through the subway system. McDonald's, KFC, Yoshinoya, and Matsuya is close by the station, and there are numerous other good Sushi and Yakitori restaurants nearby. In addition, there is 7-Eleven very close to the apartment (Japanese 7-Eleven is very different than the ones in the US or anywhere else, it really does have better food quality)
Lastly, but most importantly, the apartment. When we first came in the place, it was sparkling clean, and it had more than complete amenities (e.g. microwave, stove, electric kettle, utensil, towel). In addition, it has a washing machine and balcony to dry clothes. The bedroom is tatami-based and three mattresses (along with an extra thick padding if you are like me who has back issues).
All in all, I brought a 6 month old baby and 5 year old daughter, with my wife, and we were able to enjoy Tokyo mostly because of the Airin's homely apartment at the end of our daily trips.