Andrzej is a hospitable kind and tolkative person; he is responsible and respects other people's private space. Andrzej speaks Polish, German fluently, a little bit Russian :) But it was not problem, we understood each other any way.
His flat is in a quiet nice cleaned home, it is absolutely safe place.
Location is good enough - only tnree metro stations to tne center and is about 40 minutes to the Tegel airport by public transport.
There is a very good Vietnamese restaurant Nguyen Kitchen just near Bernauer strasse metro station.
Thank you, Andrzej, for your hospitality.