We had a great stay in this apartment. Prenzlaur berg is a great neighbourhood and the area around this apartment is awesome. Loads of great Cafes and bars on the street and a park just at the end of the street. You can easily get the metro to Alexanderplatz in about ten minutes. The apartment itself was perfect for our week long stay. Plenty of room for two people, very comfortable and the information left about the apartment and the area was very helpful.
If you don't like stairs then this apartment isn't for you, otherwise it's the perfect place for getting to know Berlin!