Marco is a wonderful host. The appartment is perfect for 5-6 people and it is very clean and well maintained. It's a few minutes walk from the Metro stop Carolina Michaelis from where all the metros (A, B, B-Ex, C, E and F) go to the city or to the airport.
We had Internet problem on the day we arrived, and Marco tried his best to fix it, but unfortunately he had to call in the expert. His dedication to fix the issue was what made us give full stars. Great Host. Great location and beautiful apartment.