Alexandra was very nice and showed us around the great apartment. Wow! It is so beautiful. We were with a party of 8 and every couple had their own room. The beds were comfortable and the two bathrooms made it possible to get going quickly in the morning. Prenzlauer Berg is a real nice area. And the apartment is close to the public transport, but we rented bikes at Lila Bikes for €8 a day! Berlin is a great city to ride bikes.
I would recommend the apartment! It has all the one needs and it is in a great area.
Alexandra was so nice, we had a delay of two hours and it wasn't a big problem for her. We just texted her 10 minutes before we arrived and she was there.