The apartment is exactly as advertised. Clean, good hot water pressure, comfortable beds, and a small kitchen area. It's in a quiet location off the main Shinjuku area but close enough that you can walk to the heart of Shinjuku within 10-15 minutes. The place is easy to get to using Google maps just by typing in the address. It's close to several subway/train stations with easy access to other parts of Tokyo. We visited Shibuya, Tsukiji, Akihabara, Roppongi, Diver City, and Ikebukaro just by walking to the station and using the subway/trains.
The apartment fit 5 guys comfortably for a week and Hoichi was a great host. He picked us up and dropped us off at the main Shinjuku station which helped us immensely. He was readily available via text and answered our questions and gave suggestions about train routes, places to eat, and things to see.
There is a small bakery located downstairs and a small laundromat across the street if you need to dry your clothes (apartment has a washer). Also, several convenience stores are nearby in case you need anything. Highly recommended and would stay here again on future trips to the area.