What a great experience!
Yoshimi and Marek's Oshiage Holiday Apartment is THE best opportunity if you want to live the real Japanese daily life. Do not be afraid of anything you might not know or have never done - they have put together very detailed information about how to use the different equipments such as aircon, bathroom, kitchen etc.
There is also plenty of information regarding sightseeing, maps and places to eat.
The location is approx. 10 minutes from Oshiage subway station which is very convenient to reach the airports Narita and Haneda as well as the downtown subway stations.
We slept very well on the Tatami and will for sure miss it when we are back home! The neighborhood is VERY quiet, surprisingly for one of the biggest cities of the planet. We ill definitely check again should we again be in Tokyo in the future.