The stay at Johanna's place was very pleasant for us. She's a very congenial girl. The room is really quiet and very comfortable, the appartment had everything we need during our stay in Berlin. It is high clean, comfy and friendly place to stay.
Johana was a bit late during our arrival, anyway it was great opportunity for us to explore the neighborhood, which is very nice and peacefull. We chilled in the lovely park (Humman platz) and found out a cosy Bäckerei (corner Kuglerstraße x Varnhagenstraße). The place has great transport connection to the city center.
I would totally reccomend!