Nikolai is such a great host, he makes you feel at ease. The first thing he said when we got to the apartment was "feel like at home" and we actually did. You have your privacy but he's also available to talk and give you valuable advice about the city.
The apartment is really bright and clean, with the tram stop right in front. We found not only a good host but also a new friend, if I have to come back to Berlin I would definitely choose Nikolai's place again!