Steffi's flat was great! It is a short walk to Berlin Hbf which will easily get you around the city. It is located in the heart of the city and is easily accessible for tourists coming from the Airport or the Train station. The Flat was clean and everything you need is there. It has a great view and a balcony. The area is one of the safest places I've stayed in and Steffi is wonderful host. She provides you with tips and maps for getting around the city.