We usually stay at hilton shinjuku and can say that this was a comfortable, clean and spacious apartment.
Midori was very quick at responding to any questions.
3mins walk from Okubo station (next stop shinjuku), local convenient store downstairs.
Location/convenience: 4/5
Cleanliness: 5/5
Size: 5/5 (very spacious)
Facilities: 4/5 (all necessities included, however empty fridge and literally no food)
Overall 4.5/5
Thanks Midori
JS