It was my first time finding places in Airbnb, and I found it like Jackpot! The perfect experience of staying in Narimasu (成增) and Yun's house was way behind my expectation. In terms of the location, Narimasu is in the suburb area of Tokyo, but the place is quiet yet convenient. You can always buy stuff and find things to eat around the station. Also, you can easily access to big cities, such as Ikebukuro (池袋) via commute trains and subways. It is also very close to, one of my favorite places to visit, Kawagoe (川越). You can take the Tabu line from there to Kawagoe to experience the traditional culture of Japan. Thus, I highly recommend Narimasu.
As for the room, it was wonderful. First of all, it's a room of yours. You don't have to share with others, and you will have your own toilet/showering room. Also, the facilities in the rooms are very nice. You got your own microwave, a little bake oven, a fridger, a coffee machine etc. Furthermore, the hosts, Yun and her husband are very kind and willing to help. They were always happy to assist and answer my questions. They also gave me great advice for places to visit and the transportation to the airport.
All in all, as I promised to Yun, I would definitely write a positive comment to describe my stay, and here I am. Once again, I got to thank for the hospitality !