Lovely apartment right near Koenji station. The apartment is comfortably furnished, and has two toilets and two bathroom sinks, which makes staying there with a group a bit nicer. There's also a supermarket and convenience store right nearby.
Our only real problem was that the two street-facing bedrooms were quite noisy: people were exiting nearby bars into the early morning, and the JR trains were audible in the morning. Some better soundproofing on those rooms would go a long way.