CDG-TXL. Airport simply convenient but not fantastic. Main advantage is the very short distance between aircraft and airport exit. Regular and convenient bus connections to various downtown locations - TXL line serves Berlin central station and Alexanderplatz while X9 line runs to Zoologischer Garten railway station. Using the self-service ticket machines outside the terminal is the quickest option as information booth is usually overcrowded. Check-in efficient and hassle-free. Security staff friendly but a bit too relaxed. On the downside boarding areas are rather cramped - do not go airside too early. All signs within the terminal should be clearer in particular regarding public transportation.