Jens was really helpful although we did not see him. he sent us very informative messages before our arrival and was completely flexible with our check in and check out. The place was really nice, warm and clean but small(the room) . the kitchen and the living room were really cozy :) . Aldi supermarket is exactly in front of the place and reaching the city center was easy by the close train station. The East side gallery is just 10 minutes by walk! . the only disadvantage of the place for us was that it was on the fifth floor without an elevator so since we had some very heavy luggage it was not very convenient to carry them upstairs.
I recommend the place for those who look for a cozy place to stay :)