We arrived in Berlin very early in the morning but fortunately Hendrik arrived very soon once we called. The key handoff was extremely easy and Hendrik even offered us some advice about Berlin (all the advice is also in a handbook in the room). Hendrik also allowed us to stay late on the last day as our plane left late and no one was stating there after us.
The place itself was just as described, very clean and an excellent stay. Its also a short distance from 2 trams that take you to a alexanderplatz where a majority of the subways connect to. Nearby is a very cheap grocery store (lidl) and some very nice cafes.
Overall an excellent place and host that I would highly recommend.