We really enjoyed our stay at Luke's apartment. It's perfectly located near all the best bits of Kreuzberg, and was generously equipped with everything we needed.
Luke was really friendly, and met me at the apartment to let me in and show me round in person - not something that's very common on Airbnb any more. He was in touch and helpful throughout our stay.
I'd definitely recommend Luke's place and will stay here again next time I'm back in Berlin.