Nikolai's apartment is perfect for visiting Berlin. It is very close by tram to Alexanderplatz. The apartment was very clean, and we had a big room with enough space in the closet. The bathroom is also very big. Nikolai left for us plenty of things for breakfast. We were not able to meet Nikolai, but he made things easy for us to get the keys and made us feel as at home (thank you very much for the chocolates :) ).