We spent 4 days in berlin, in Alexandra's flat. In would comment 3 things :

1) Berlin : very nice city. Historical and charming city. With lots of things to do.

2) Alexandra : it was her husband who welcome us. He was equally enjoyable than was Alexandra by mail. We receive the explanation we expect. And Alexandra take time to see us in ordre to wish us a pleasant stay.

3) the flat : he was perfect. He was even prettier than picture. Quiet, well located and clean. I recommanded it !