Cornelia wasn't there during my stay (as had been previously arranged!) but had cleared lots of space in cupboards and on shelves for me to use, marked with cute little post-it notes for convenience. She was good at answering my questions before I arrived, and left clear instructions on how to work everything, from the washing machine to the stove, even including emergency numbers, maps etc.
Everything was as advertised. The room was spacious and tidy, and literally just across the road from the university. There is also a little coffee shop just downstairs. Her flatmate, who was still living there, was incredibly kind and helpful, providing advice on all sorts of issues like the wifi password and local doctors, though of course had his own schedule to keep so we did not see one another very much. I was a little late in arriving due to a flight delay, but he was lovely about it and even offered me food alongside my key when I finally made it there.
All in all, this set up worked for me very well, as I was looking for somewhere to live for just over a month. If you are looking for a tour guide as well as live-in host, you may not have the same requirements as myself. However, my experience has been very positive. If you are willing to get to know the u-bahn lines, it is a very short journey to town- just a few minutes on the 43/44 tram to Schottentor, and a simple connection to town on the underground.