i'm from indonesia. stayed there for 4 nights (business+holiday). the place is better than what i was expecting. the ambience of this place is really unique, that what makes this place interesting. her place is just around 5mins walk from the U-bahn Friedrich Wilhelm Platz (line U9). Katja is very friendly, so no need to be in doubt of her "spooky" place. her cats also very friendly. she showed me where I can eat the best currywurst and kebab (it's near her place also). she also showed me interesting places to see in berlin. bed is OK for me. the room is quite spacious. bathroom is OK also. the point is: this Katja's place should be in your consideration. :)