to get from the airport, take the airport express train to Ostbahnhof, stops at platform 2, change to platoform 11 and get off next stop Jannowitzbrucke. Turn left out of the station, then it's a right at the cross roads and follow the road round to the apartment ( use ur Google Maps for this bit!) 10 minute walk max. You must scan your tickets before you get on the train, the machines are on the platform.