The apartment is nice, as described, ok. But there is an extra tax (city tax, because you are a tourist in Berlin, using a hotel) that you have to pay to the Agency - owner of the place. Actualy, you are renting the place for those days, not a conventional Airbnb Experience.
This is not a problem, and saved us when we have a real problem with the front door. We could change to another apartament (things that you only can do with an agency, not with a personal owner of a house).
At the end, the experience was nice, Katarina helped us always we called her and "the agency" worked as expected, apart of the distance from the Airbnb Classic Experience.