We didn't get to meet Lorenzo, but he did check in with us to make sure we were comfortable throughout our stay and Katharina was there when we arrived to meet and show us the apartment. A friendly neighbor also provided us with tons of great recommendations and tips for navigating Kreuzberg and beyond as well. Perfect base of operations for us, great location, easy to walk to tons of interesting sites and museums and very close to public transportation should your feet finally give up at the end of a long day like ours did. Great spot, highly recommend!