We loved Kimmy and Dee's apartment! The location is very cool, there are lots of cheap and good restaurants around, and Asagaya station is close to the apt, with several lines to central Tokyo. We loved the pocket wifi, and Kimmy and Dee are wonderful hosts, extremely kind and helpful.
The stove could be tricky to use and if you need the room to be completely dark to sleep, you may have trouble sleeping as the curtains don't cover one window completely, but otherwise it is a very good place to stay at. We felt at home :) thank you Kimmy and Dee!