A little tricky to find, but definitely worth it. GPS might take you to the opposite side of the building, so you may have to walk around the block to find it. Other than that, our stay was amazing.
The space was clean and modern. The kitchen had everything needed to make a full meal, and there is a grocery store within 2 minute walk away. All of the appliances are modern and very easy to use.
The area is filled with Izakaya, Konbini, and nice parks all within walking distance. The Seibu Shinjuku line can get you from the AirBNB to downtown Shinjuku within 10-15 minutes. However, it is still secluded enough that we didn't have issues with noise.
We stayed for 2 weeks, and Yume was responsive and helpful. She is a professional, and although we never met face to face, she was always available for questions. She gave very clear instructions, and used photos to make sure we knew everything we needed to know.
We would highly recommend staying at this, or any of Yume's Air BNB's.