Gregor's flat is perfectly located to explore Kreuzberg and the rest of Berlin on foot or via the nearby U-Bahn. We were travelling with a teenager and a toddler and the flat worked wonderfully for our family. The flat is spread across 3 levels, so you'll have to climb some stairs, and the shower can only be accessed through the master bedroom, but the pluses more than outweigh these minor inconveniences provided you're able-bodied. We'd happily stay at Gregor's again and recommend it unreservedly. Thanks, Gregor!