Unfortunately I didn't get a chance to meet Jetty but she was very helpful in answering any questions I had over the phone/e-mail and seemed really lovely. The room was spacious, bright, clean and comfortable and the rest of the flat was great too. The location was excellent, just a few minutes walking distance to great shops, places to eat and the tram stop to take you to Alexanderplatz, I'd highly recommend staying at Jetty and Katja's place!