My stay with Sonja was simply wonderful!
The flat and room are both beautiful with a comfortable bed and plenty of space to put clothes away.
Prenzlauerberg is a great area, the streets are quiet but it is still full of quirky restaurants, bars and shops. The flat is near the M10 and M4 tram stops making it very well connected to the rest of Berlin. Alexanderplatz is only a 10 min tram (M4) journey from the flat or a 25 min walk.
Sonja is a wonderful hostess and knowledgeable about the city. She made me feel right at home. Much recommended!