Perfect situated apartment, very easy to reach with public transport only 5 min walking. Volker was a perfect host although we did not meet him he helped us with directions to get easy from the airport to the apartment and early check in was no problem. Check in was very smooth with the electronic lock. Apartment had all the facilities, we even had a small chocolate as a welcome gift. Also very clean. If I come back to Berlin I would take the same apartment again.