The apartment is excellent. It has three spacious rooms with nice interiors. The beds are suitable for a company of 5-6 people to stay. The kitchen and the bathroom are clean and fully equipped.
One of the main advantages is the location. Several U-bahn stations are available in 5-7 min of walk. The central park, Tiergarten, lies in 15 min of walk and it is possible to walk through the park to Bundestag in less than 1 hour.
The surrounding streets are very nice, green and quiet. There are bars and restaurants near the Wittenbergplatz.
Overall, it is a very nice place to stay.