Caroline's flat is lovely, bigger than the pictures show with a quiet balcony facing the courtyard where you can sit and recover from tiring tourism. The bed was huge and very comfortable and the kitchen extremely well equipped. The flat is also very central, just a stone's throw from Friedrichstraße station (great for all sorts of connections), and a 15-20 minute walk to the Brandenburg Gate or Museum Island, depending on your walking speed. We would recommend the restaurant downstairs, Five Rivers [it's name is in English] and there are three supermarkets within a 5 minute walk. Caroline was extremely helpful - we were very delayed by trains and she worked hard to ensure we got into the flat, even though we finally arrived at 11.30 at night! All in all, one of best properties we have stayed in and we would highly recommend it.