Very good location.
Just upsatairs of Higashi Shinjuku Subway Station.
24 hours open restaurants, supermarkets are within a few minutes on foot.
Shinjuku shopping area & Shin-Okubo(Korea town) are also within 10min on foot.
Easy to check in, and Seiji answered very quick always.
Room has everything which you need to stay in Tokyo.
Unlimited volume WIFI in room works well + you get a portable Wifi w limited data volume separately.
I recommend the apartment when you want to enjoy Tokyo life!