The room was perfect, clean and organised, even though the bed was really hard.
Carola is nice and helpful. She and her son were not there most of the times, and the house is beautiful and quiet, plus the neighbourhood its a really nice place to be.
The common area (kitchen) was kind of dirty, the exception were the bathrooms.
And the only problem is that if you're 2 persons you will only get one key...
If you want to go to Mitte there is the S1 going there and depending where you'll need to change, but the connection is good (aprox. 25 min. To Mitte).