There was no problem with communication with Birgit, she speaks English perfectly, she even explained to me how to get to the apartment from the airport. We arrived around 8 and late check in was possible, the lady who came to greet us didn't speak English, however, she spoke Polish which was easy to understand, she showed us around the apartment. The location of the apartment was great, right next to the U1 metro stop with a supermarket nearby. The apartment was nice and warm and even though it was located not far from the centre it was quiet at night. I recommend booking this apartment and hope to come back soon :)