It was a lovely stay. Katharina’s appartment is the same as in the photos, very comfortable, quiet and bright. Both the bathroom and the kitchen work perfectly and I had all the comforts, as if I were at home! Katharina is super friendly, always willing to help you if you need it. I spent little time with her (she was out of town most of my stay) but even so, if I needed anything, I could text her (finally it wasn’t necessary) The area is the best! there is a 5 UBahn stop at 50 mts., it is very close to Karl Marx Alle and the neighbourhood (Friedrischshain) is full of bars and shops. When I return to Berlin, I will definitely stay at Katharina again!