Rainer is a fabulous host who communicated very well with us regarding our check in and directions to get to the apartment. He was there exactly when he said he would be with the key to let us in, show us around and he also gave us great recommendations on which Christmas Markets to visit during our stay. The apartment was lovely with everything we needed and in a brilliant location for getting around the city easily. Despite it being very central and close to Alexanderplatz and public transport links the area was lovely and quiet. I would highly recommend Rainer's apartment for your city break to Berlin.