The apartment was accurately described as per the ad and reviews. Good value for money. Good communication with Stephanie prior to arrival. Great area - subway on the street of the apartment, a major train station 10 mins walk away, and another very useful station 5 mins walk away. Transport from airport is easy and cheap. Many attractions are quite walkable from the apartment. To describe the immediate area of the apartment itself - there is a boutique hotel, designer clothes shops etc, but also a good number of eateries and cafe / bars to suit all tastes and budgets. Central enough to enjoy the amenities but without being too noisy or suffocating.
Due to the size of the apartment there is no sofa. But we knew this when booking.
At the end of our trip having travelled around Berlin as tourists, we were still very pleased with our apartment and it's location. Recommended!