The location is good, a walking distance from the Hauptbahnhof and Bradenbourg tor and the subway station is really close to the apartment. The check in procedures were really well explained and, followed by the "welcome-kit" instructions, we did not feel misguided.
The apartment as a whole was clean, bright and spacious. However some details made our stay a little less comfortable than we expected: the bed linen were extremely dirty and we informed the host about the issue, she presented a solution but she did not answer our messages after that ( we were there during Christmas holidays, so communication might have been affected). The bed was hard but comfortable enough to sleep ( she made it very clear in the listing so we were prepared). The bathroom had all the necessary facilities ( soap, hairdryer, towels) but the kitchen lacked some amenities, for instance the toaster which was not working at all. The lights in the corridor were not working too, so it may have to be fixed soon for the next guests. In general it was a very good experience, we would recommend this flat and we'd come back.