I have only good things to say about my stay at Joel´s. The room was very beautiful, totally quiet in the night and the bed was so comfortable that it was hardly impossible to get up in the morning ;) Also the shower was hard to leave as it was very nice. Everything was very clean and the communication went smoothly. The apartment is within walking distance to a lot of cafés, bars, U-bahn(Metro), supermarkets etc. and Tempelhofer Feld.
I highly recommend to stay at Joel´s apartment.