Although I never got the chance to meet Alberto, he provided me with detail instruction to get to his apartment. The room is exactly like the photos. The room was quite large and very clean. We were able to use the kitchen which was very useful as there was a supermarket just in front of the place. Great location, it's about 20 minute walk to Alexanderplatz. I'll definitely choose to stay here again if I were to visit Berlin again. Thank you Alberto!