Friedrich's place is really accessible, with several stops around it. The neighborhood is quiet and super safe.
The place itself is an old building, so it's understandably rickety, but Friedrich's unit is well kept, clean, and spotless.
As a host, we had no problems as well. He was available when we checked-in, and gave us very helpful information about the area and how to get around in general. In fact, one of his recommended dinner places is now one of our favorites, too. :)