I spent 11 days in Tokyo at Manami's lovely apartment in the Koenji district. The area is lovely. It has a youthful vibe - think artists and musicians - good shopping and good food.
Manami was an excellent and thoughtful hostess. When one night the temperature dropped, she got in contact with us and provided my girlfriend and myself with extra (super warm!) blankets.
The apartment itself was spotlessly clean, and obviously well-maintained. In addition, the kitchen area (note to Americans - smaller than you are used to, but super functional) was well stocked with equipment for cooking; I managed to put together several meals quite easily. Included as well is a washer for clothing, which was very useful midway through our trip. Finally, the shower was thoughtfully stocked with soap, shampoo and conditioner.

I think that the best review I can give is simply that I would absolutely not hesitate to stay again!