I stayed a week at Heidi’s apartment in Berlin and it was great. Located within walking distance to Potsdamer Platz so you can check out everything there and get to wherever you want in the city easily by public transportation. There are other U, S and bus stations located nearby as well. Heidi kindly greeted me for check in and gave me an overview of the apartment. I am glad I made the choice to stay here and would recommend to others who are looking to spend a few days in Berlin.