The appartment of Arnd is near the Berlin central station about 10 min walk. It is easy to get around the city from there. You can walk, take the bus or tram etc. He was not at home while we were in Berlin so we did not have the chance to meet but he made sure that we had a great time staying there. We were allowed to use the kitchen, fridge etc. The apartment was really nice, clean and comfortable. I would definitely recommend it to others.