Corinna's place was a great base in Berlin. The surrounding neighbourhood (Neukolln) has tons of bar and restaurant options, shopping, sights, etc and once you've exhausted those it's close to an u-bahn station to get around to the rest of the city. The apartment itself is quite large, the room is beautiful, peaceful and relaxing. We didn't meet Corinna but she was quite communicative via messenger and her roommate Simon was quite nice and helpful in person! Highly recommend this place!