The apartment was very nice and comfortable. The place was clean and was easily accessible by bus / metro. Melitta is very nice and welcoming, and helped us answer any questions we had.
The area was very peaceful and quiet, and since the transport networks were nearby, it was easy to go to the city (2 blocks to bus stop, bus to Hermanstrasse, U8 to Alexanderplatz). I was able to be in the city in 30 minutes.
Would definitely recommend to anyone staying in Berlin.