Cass is an amazing host, who gives you ample privacy in one of the most beautiful apartments in all of Berlin. If you're looking to party, her place is in the absolute best location - next to the ring-bahn, but also one stop from Warschauer - the party district.
The apartment itself is gorgeous, extremely quiet and absolutely delightful in every way. I would come back in an instant if I needed a place to stay in Berlin.