As soon as we arrived to Helga's place we were surprised that it look even better and bigger than photos in Airbnb. A eastern berlin "soviet style" building absolutely renovated so inside it looks like new. Communication with the hosts was very good. Helga told us that it could be a little difficult to find the place for people who are not familiarized with german street numerations, and for that reason Alex, husband of Helga, offered us to meet near the apartment to make it easier to arrive. (Thanks!) He explained us every detail of the place, gave us some tips to move around the city and told us to not hesitate to ask whatever we need to have a great stay in their apartment. It is very close to a U-Bahn and a S-Bahn station and it allowed us to travel though Berlin very easy.
Definitely I'll recommend it!