Maria and Sterni were great hosts, really hospitable!
They gave me a map of the city and useful suggestions regarding museums, events, restaurants etc.
I stayed one week and i had a great time. The apartment was as in the description and the bed is comfortable. The connections are good, since the U-bahn station is close. Alexanderplatz is just two U-bahn stops away.
Finally, Friedrichshain is a very liveable and attractive district.