Wonderfully accommodating and kind host, and the space is immaculately clean. Was in room 301, which has a balcony with a few little koi swimming around (a nice unexpected perk).
Location is about a 15 min walk from the heart of Shinjuku, with many places to eat and drink close by too. It's on a quiet side street, so there's very little noise.
Overall a lovely experience. Would definitely come back!