A wonderful gem in Berlin! Quiet neighborhood but still full of restaurants. The place is in between 2 stations which are walkable. Joshua's place is spotless clean and you can play with the cats! One flight of stairs is not a problem and they informed us about some possibilities of noisiness but we found no problem at all because the bed is too comfy.
We felt like home here and would love to come back if we have a chance to visit Berlin again.