I've been in Martin's flat five days and my experience was excellent. The flat is new, well equipped with coffee machine and a small kitchen. The bath is also new and the beds are really comfortable. The flat is located in a quiet area of the city, 2 minutes walk from the tram station and only 10 minutes walk from Potzdamer Platz. Martin has been really kind and he gave me useful advices to move in Berlin and also to reach the flat from the airport. My experience in Berlin has been amazing and I recommend this host!