Arthur and Marina (and Zippi the bulldog) couldn't have been more welcoming. The space is wonderful and clean, the private bathroom is cozy but beautiful, and they were the most gracious and supportive hosts I've had in all my travels. The location itself is in a cool part of town (Prenzlauerberg) that's close to the trams and the S-Bahn, but I just walked everywhere and I was able to get to Mitte and beyond within 30-45 min. Lovely stay!