Staying at Christian's and Verónica's place was great. It's a really nice, big, clean apartment with great modern design and layout. It has very high ceilings and feels very spacious. It's located in a very quiet residential area of Friedrichshain, a great retreat after a day of going out into the city. The U-Bahn and tram are a few minutes' walk away. There are also stores and restaurants within a few minutes' walk. Highly recommended.