The apartment was lovely. It lies in the centrum of Berlin with a metrostation and a supermarket on only a few minutes walk away. The apartment was nice and clean and the kitchen has everything you need except for a scale. The beds are comfortable and the view is fantastic. The bedrooms are smaller than I thought they would be, but for a vacation it is ok.
Upon arrivel we were greeted by a colleague of Sven, who explained everything clearly and showed us where we could find everything.
Sven's response time was less than an hour when we wanted to book, but later it was more. 30 hours at most.