This is a nice cozy home in a very local neighbourhood. We liked the local owned/ boutique shops and food stalls around the house so we enjoyed the stay very much.
We had 2 issues during our stay - 1) persistent drain flies in the shower every day even after we tried to wash/flush the drainage, and 2) we couldn't use the house WiFi because owner couldn't find the password.
It is about 10mins walk (with luggages) from Sasazuka Station (around 4 stops from Shinjuku Station). Good if you're travelling with a group of friends or for young families, but wouldn't recommend for elderly or if you have issues climbing stairs. It is pretty steep and rather difficult to carry your luggage up the stairs.