This place is a god-send. Accessible from the JR Yamanote Line. From Narita it's an easy transfer (Skyliner, Nippori Station), a few stops, and a quick, partly downhill walk from the Komagome Station's North Exit(same level as the platform). Lots of restaurants (dine in, takeout), a big drugstore, a 7-11 , a 100-yen shop (!), a TaQbin (!), lots and lots of shops between this and the station.
The apartment is exactly as described. The owner, Kaneyama, is a very thoughtful individual. Everything we needed was there. He went out of his way to make sure we didn't have problems checking in, especially with an item we had requested at very short notice. He even left us a nice pile of sweets and snacks along with his Welcome card.
We loved our stay at this apartment and count ourselves lucky we trusted our instincts and did what we've never done before: book a place with no reviews. :)