The host was not available and sent a surrogate to provide the keys. Only point of confusion seemed to be the "late fee." But after some back and forth they realized that they were incorrect.

The apartment was super clean and well appointed. Very comfortable and in a great location. Friedrichshain is a fun, interesting neighborhood and a great place to stay in Berlin. Do not be put off by the graffiti - it's part of the charm (I mean that honestly). And perfectly safe.