Unfortunately, I couldn't meet Alina in person, but she was really sweet and helpful online. She told me everything I needed about transportation/Berlin/accomodation. We picked up the keys in a nice italian restaurant across the street. It is a new modern building with modern furniture. There is an amazing view from 14th floor, which you can reach by elevator. The place was clean, well equipped and great location. The bus stop was about 3 minutes by walking and from there 7 minutes Alexanderplatz by bus. There is a Liddl and metro station you can reach within 5-10 minutes. Also Check Point Charlie is near, which was great! I am totally satisfied with everything and I can't think about anything negative.