Armi's apartment is great; perfectly situated, in a central but quiet neighbourhood very near to the U-Bahn. It's a nice space, with a beautiful french balcony. Everything was nice and clean when we arrived. Armi is also a good host, who provides answers to any questions you might have about the apartment or neighbourhood quickly.
The only less positive thing I can think of is that the sleeping couch is a bit worn and up for replacement.