If you wish to experience an authentic Japanese's neighborhood lifestyle, I would recommend you to choose to stay in Masami's apartment. Hatagaya is a very peaceful place in Tokyo and the people in Hatagaya are friendly. You will have a chance to experience a quiet lifestyle and enjoy local Japanese's restaurants.
Masami is a very helpful and responsive host. Her apartment is neat and cozy, the information provided is accurate. The public transportation in this place is accessible, just a short distance walk to train station (Keio).
My family and I have a pleasant stay in Masami's apartment. Thank you Masami! Hope to see you soon in near future! :)