A lovely 30 min walk to the main Shinjuku area was quite nice for the nights we wanted to stay out later than the trains ran. The room is also a 7 min walk from the local station so that was also quite convenient.
If you are not a fan of thin walls and sound traveling across this room I would avoid it. Although the room is in a quiet neighborhood and door opening or construction happening was quite noticeable.
I also describe this place as a room because it feels like one rather than an apartment. The layout is a little inconvenient but still cute and the bed is comfortable.
If you are traveling alone this place is great. But with two people traveling light it was a bit cramped.