The apartment has its pros and cons. On the pro side: the location is perfect: very central, near to the train station Rennweg and lots of grocery stores and restaurants near by. The apartment is also very spacious.
But our stay was still not only positive. The apartment was cleaned before our arrival, but there were still spiderwebs hanging off the ceiling and walls in every room, dust and spiderwebs under and behind the beds as well as in the closet. There was dust and dirt hanging off the steam vent in the kitchen so that we didn't dare to use it at all. The vacuum cleaner was also very dirty and didn't have much power.
Daniela did respond to my messages and also arranged a second cleaning. The cleaning team came over while we were out. The result was not very satisfying. They did clean under and behind the beds and did some dusting, but the things I specifically asked for (dust and dirt on the steam vent and spiderwebs and dust on the wall) was not cleaned at all.
The kitchen was poorly equipped, there were only the most essential items there. But for a longer stay (we stayed for one month) one might also need things like a potato peeler or a lid for the pan (just to name a few examples) The grater was rusty so we didn't use it. And the dishwasher didn't really wash very well, the glasses came out still a bit dirty.
There were also absolutely no cleaning supplies in the apartment besides the dishwasher soap. So if you want to clean the tub, bathroom floor or toilet once during your stay (which is usually the case when someone stays longer than one or two weeks) you have to buy all the supplies yourself. So we bought full-sized bottles of cleaning supplies, just to use them once or twice during our stay.
I would highly recommend to Daniela and her team to invest more time and effort into cleaning this apartment. Yes, it's an old building that produces more dust than a new building would, but the level of dirtiness we experienced is not acceptable and could easily be improved. Also I would suggest providing more equipment in the apartment, especially the kitchen.