My stay in Tokyo was in real comfort and this place made me feel at home. If you want to travel with no worries about your stay, book this apartment!
If you are not familiar with the trains in Tokyo you might think it's bothering to take two stations to go Shinjuku but you can actually take only one if you take the Fukutoshin line in Kanamecho (Otherwise Google give you a transfer at Ikebukuro to save 3 minutes).
Also, there is a convenience store at 2 minutes walk from the opposite direction of the train station.
Knowing those two little things made my stay even more enjoyable! :D