Our stay with Arne and Ute was great. Very helpful people, very welcoming and supportive. If we needed any help, they were always available. The apartment is a few blocks from the U-bahn, which connects you easily to the rest of Berlin.
It is a very clean place, with all things you could ask for and more. Nice design details. The communication with Arne and Ute was also very good and they were very flexible. I would recomend them to anyone who would like a comfortable and relaxin stay in Berlin.