The place is very nice, with two very large bedrooms and a large bathroom with a huge tub and separate shower. It is very secure with multiple secure doors to get to the apartment. It is very quiet also. The place was also clean, and the washing machine works well.
We didn't meet anyone at check-in or check-out, but the instructions were clear on how to access the key.
The apartment is easy walking distance to the Brandenburg Gate and the Bundestag/Reichstag. It is next door to the Bunker gallery. Also close to the train stations.
I would stay there again.