The apartment is exactly as the advertisement, it has a nice bed, a great terrace, a small kitchen and a bathroom. Everything was clean and cozy. It also has a portable wifi which is very convenient to take around the city.
The neighborhood is great, not in the center of the city but you can find lots of restaurants, bars and groceries in less than a 5 minute walk.
As a drawback Hatagaya station is not included in the Subway and Toei lines, so you need a special ticket to link with either of them.