We didn't meet Ralph but were greeted by his friend who gave us the keys and showed us the apartment. The apartment was spacious and spread over a long corridor. The kitchen was well-equipped and the apartment was clean. The location was good for those wanting to explore Kreuzberg and really close to two U bahn stations. The apartment was warm with the heating on but unfortunately the boiler in one of the bedrooms was quite noisy, meaning it had to be turned off at night, so it became a little chilly. But overall a clean, spacious and well-located apartment.