I stayed at Daniela's place for 4 weeks and they wholeheartedly welcomed me into their home. You will feel right at home and it will never be boring while at the same time you have always the possibility to retreat into your room if you need a little break for yourself.
The room itself is quit big with a connected TV and a big closet.
The neighborhood is rather quiet and right outside is the Schlosspark, perfectly situated for a quick run.
Communication was seamless.
Will definitely stay here again next time in Berlin.