Poca's place has everything one might need during a stay in Berlin. I stayed there for almost a month and did not run into any problems at all.
The place has a nice little balcony with a view of a gorgeous chestnut tree, and it faces the courtyard, so it's quiet. The location is unbeatable. Lots of cafes and restaurants, and the Hermannplatz / Schonleistrasse U bahn stops are within a 5-10 minute walking distance.
Poca was very quick at communicating and all went really well. Strongly recommended.