Manami's flat worked very well for me. Location is good, about 10 minutes to koenji stn, and a little more to nakano which has better train connections. Train tracks are nearby, but I was never bothered, the sound is a hiss as the trains pass. I did not cook in the kitchen. It's small, and the combini is right around the corner. I am 60 and fit, but not athletic, the bed ladder was fine for me, but is not for everybody.
I was happy with my stay and would definitely consider a return visit.