For a family of five, with two adults and three young children, the stay at Yaz's place was a great fit. Ample space, beds for everyone, clean and comfortable, with its own entrance directly from the street. Since the apartment is situated on basement level, it provides a cool relief for hot Berlin summer days. The street and neighbourhood is calm and nice, with a little playground next door, and lies close to both the metro, bakeries, restaurants and cool stuff in Kreuzberg. Parks and the grand Templehof field is within walking distance.
I found Yaz to be a communicative, helpful person, who took pride in cleanliness and service. He is easy going and obviously enjoys his food. Ask him to give you some nice recommendations and he'll go off. A great stay in Berlin!