My partner and myself really enjoyed staying in Raquel's apartment! The space is quiet, well organised, and very nicely furnished/decorated. As other guests have mentioned, the apartment is just round the corner from a U-Bahn station (metro), which will take you right in to Potsdamer Platz, and the centre. There are a lot of really good bars and restaurants close to the apartment, and for any pizza lovers, I'd recommend Simela's which is very close by. I would highly recommend the apartment, and would enquire again if I was to return to Berlin!