This is an excellent place to stay in Tokyo. The location is fantastic -- close to the nightlife of Roppongi but not *in* the chaos/noise. The apartment is in a nice, quiet neighborhood.

There is an adjacent expressway, but because of the amazingly effective double windows, you rarely hear any outside sound. The closest subway train station is about three minutes away, and several others are within easy walking distance. Many stores and restaurants in the immediate neighborhood.
The apartment itself is very compact, like a Japanese business hotel, but the bed is large and very comfortable, there's a small kitchen, plus a washing machine, and the bathroom has a laundry drying feature. The building is modern and nice. The apartment furnishings are exceptionally nice, and very large windows offer a spectacular view (at least until they put up a large building across the street).
The host responds very quickly. I would be happy to stay here again!