Lena responded very quick during our communication before arrival, we checked in when it was convenient to us. The flat was not bright because it is located on the underground level. But as we spent most of the day walking and just came to sleep it caused no problem. The location is good. we found Marheineke Markthalle in 5 minutes walk and had nice breakfast there. Close to the airport, Alexanderplatz. We didn't experienced any problem. Lena, thanks a lot.