We stayed for 6 days and it was a really pleasant experience.
Location: It is extremely close (~5-10mins walk) to Exits 1 and 2 of Shin-Nakano station.
Food: There is a delicious chicken wing/drumlet shop near the accommodation.
Peacefulness: Generally a quiet district with occasional sirens from ambulance. Also, on our last night, we heard students shouting and laughing loudly, dragging chairs and tables, running and stomping around above our unit. Feedback given to the host and he noted.
Host: Really an A++ host! Replied me very quickly and even late into the night close to 12am. Constantly checked on us throughout the stay to make sure everything was alright.
Accommodation: We had some issue with the convertible sofa as it could not be flattened into a bed. Feedback given to the host and he noted on the matter. But other than that, the house was awesome.
Highly recommended for tourists/locals who are looking for a comfortable and neighbourhood area to stay in. :D
Rating: 10/10!!