The apartment is located in the suburbs of Tokyo (25-30 min to Shinjuku/Shibuya), so you can enjoy your stay in a more calm neighborhood. The place is not too big but provides you with everything you need. There are plenty of supermarkets and shops nearby, which is also a big plus for me.
The host, Isao, is very friendly and you can ask him for help anytime. Whether you need a restaurant recommendation, a reservation at a Japanese restaurant or just the direction to the supermarket, Isao will help you out as good as he can.