Mario's place is great. It is practicaly a separate appartment downstairs. He sleeps at 1st floor and the kitchen is shared (maybe the bathroom also, I'm not sure). The space is fantastic and the neighborhood also. Distance feom the center shouldn't be a problem as the public transport in Berlin works like a swiss clock. About 10 minutes of walking till you get to the public transportation but a nice walk though in a green residential area. Definitely would recommend!