We stayed for ten days at this apartment and very much enjoyed it.
The neighborhood is close to downtown and all the attractions, but Prenzlauer berg is beautiful and interesting on its own. We had endless restaurants, cafes and bars within walking distance, and some nice playgrounds for our three year old to play at. It is around the corner from Kindermuseum Machmit for kids.
All the rooms in the apartment are spacious and the place is nicely decorated and well kept. The kitchen/dining room is a great place to hang out at the end of the day.
The apartment is in a fourth floor with no elevator. There is a little interior yard where you can leave your bike or pram.
Sofía was helpful with every little question we had, and even though she was away in vacations, she always answered promptly.