I understand this is very subjective, but at least it is the facts.
Pros:
1. Location is quite good, really close to several convenient store, about 10 mins walk from Shinjuku-Gyoemmae station, and close to Kitchen Origin (sells bento and salads).
2. Free wifi is provided and had long-lasting battery.
3. Pretty decent bed, enough for resting.
Cons:
1. There is no lift in the building, so beware if you bring heavy luggage like me, had to carry and climbed up very narrow stairs.
2. When I arrived, the bathroom is not really cleaned, it was still wet.
3. Kitchen utensils is minimal, so if you want to bring food home, better ask or bring spoon/chopsticks from the vendor.
4. No trash bin in the room, so you have to put trash on the balcony.
Overall, I had a pleasant stay. It is quite good option in the area. Thanks again for hosting me!