The location is ideal for sight seeing (around the corner from the Brandenburg Gate).
The apartment is spacious and the beds are comfortable. There was little traffic or street noise at night.
The staff who looked after check in and out were efficient and helpful. (We could leave our luggage and they called a taxi to the airport.)
The apartment seems whiter in the photos than in reality. It was perfect for people on the go but the living room furniture is basic and tv reception poor. These are minor complaints and would only significantly affect those who wanted to spend time in the apartment.