We had an amazing stay at Birger's apartment. It is a very comfortable, bright and spacious place, beautifully decorated and with stunning views of Berlin (8th floor). We immediately felt at home. It was also a great place to work (home office) and to invite friends over to cook dinner together (great kitchen with all amenities and plenty of space to hang out). The self-checkin and checkout procedure was easy and straightforward and once you leave the building the underground station is just in front of you (direct trains to Hauptbahnhof, Alexanderplatz, Museumsinsel or Brandenburger Tor). There are also some very good restaurants in the vicinty (Italian and Chinese) and a supermarket within walking distance.