Nao's flat was very clean and comfortable for my family. The bathroom was very spacious compared to other Japanese hotels that I've ever stayed. I can't say the location is fantastic but I managed to reach to the Iriya subway station by 5 min walk and to the Nippori and Uguisdani JR station by 10~15min walk. The staff was very friendly and kind. I would recommend Nao's flat for 2 people. ( a little bit small for 2Adults and 2 kids). I heard the voices from the next room during the stay and I found out 2 Chinese were staying in the next room. I am not sure that's the matter of soundproof or that's why they have big voices.