I stayed at Kelly's apartment for 4 weeks. The apartment is very nice and clean and you will find everything you need there, including very fast wifi.
I liked the neighborhood very much. The river and Tiergarten park are really close and you can make many nice walks in the area. There are also a lot of shops and restaurants nearby and the place is very well connected to the city center. Kelly was very nice and helpful and showed me around on the day of my arrival. I highly recommend Kelly's place!