WOW! What a wonderful group of people! Right away when we got to the apartment, they welcomed us in with warm conversations and wine! Jens made us maps with general info about the different districts and important transportation stops and interesting things to do and see. Sara cooked us a delicious fresh Italian pizza our last night, and even set out homemade muffins, croissants and smoothies for us for breakfast. Their friend was also so incredibly nice and helpful, and we felt right at home in his presence! Everyone was so genuine and helpful, and the place was unique and in a great and safe location. I would highly recommend to anyone traveling to Berlin! We had 4 of us--there was room, but it's a bit tight, so make sure you're comfortable being very close to one another :-)