I stayed at Masa-san's apartment for 3 nights in Dec 2018. The place is clean, stylish, near TONS of great food and drink, and centrally located for anything you want to do in Tokyo. For the location, I was initially worried about street noise, and the apartment being cold in the winter (as some of the ones in Tokyo are)... but I was pleasantly surprised. The place was warm, quiet, and very dark at night.
Masa-san was very responsive and thoughtful, giving very easy and accurate instructions for check in, and transfer from Narita.
Recommend to anybody looking for a great spot to see Tokyo.