Frank's flat is the perfect homebase for exploring Berlin. Everything was according to the listing images (and even better in reality). The apartment is clean, organized, spacious but cozy at the same time.
The view is beautiful, the neighborhood is quiet so you can catch a good night sleep without any issues. You have a supermarket within 10 minutes walking distance, a coffee place on the corner and a bakery next to it.
Frank was a great host, making sure we had the lay of the land (there are post-its all over the apartment in case you have any questions which we found very useful and funny), and leaving us some neighborhood information to get us oriented quickly.
10/10 would recommend and 20/10 would LOVE to come back :).