Alex was very helpful and quick to reply my inquiries prior to the trip. The place was comfortable, spacious, equipped and very near the U-Bahn. We had problems locating the free bicycles and was not able to contact anyone via the phone given but since the trains were nearby and easy to use, it made up for the lack of bicycles initially in our plan as mode of transport. Alex was not there to greet us but he left us with a bottle of gluhwein and stollen as a welcome treat in conjunction of the Christmas season. Overall, very comfortable, convenient and enjoyable stay.