Christian was a very nice and friendly host! He was very flexible with the time arrival and departure and he makes you feel welcomed and home pretty quickly. The apartment was clean! (very important point!). Christian is very social but also respects ur personal space very much (he asked me if he could have a friend over the weekend). The techie part of the apartment is quite fun, and the double windows in the bedroom are a delight! The place is also quite well located.
Would definitely recommend Christian’s place if you are around Berlin!