We stayed in Matt's apartment for a long period of time (3 months). Overall the stay went very well. Matt was always very reactive and quick to find solutions whenever we had some small issues.
The apartment is equipped with basic furniture, which is enough for two people to live comfortably with suitcases. The bedding is okay for a few nights but not great if you have back problems. The double beds are also quite small (1 double bed - 140cm, a semi-double - 120cm and a small sofa-bed) so it might be difficult to fit too many people.
The location is great: the apartment is located in a central area with easy access to public transportation (mita subway line, bus to Shibuya, JR Tamachi station) and many shops and restaurants around.
We would rent it again for sure.