What a cool flat! I loved the artistic, bohemian vibe of the room, and enjoyed reading in bed when I didn't want to deal with Berlin's rain. Saliha and her family were wonderful hosts. From a tourist standpoint, the flat is close to several different tram stops, and an easy walk down to Alexanderplaz and other museums and historical sights.
Note: you will have to climb several stairs, so if you're bringing lots of luggage, or have bad knees, it may not be an ideal spot for you. But after all the currywurst, I needed the exercise!