We stayed in this apartment for 5 days in couple.
Rotem was available and Orrus gave us such good advices about Berlin and public transportation.
The apartment is located at only 15-20 minutes from Alexanderplatz, and the nearest U-station is at few meters.
The flat has a really big living room, a fitted and equipped kitchen. Our room was big too.
We had no problems, actually the flat was in line with our expectations !
Thanks to Rotem :)