The flat is perfectly fine and clean and you can reach the heart of Rome in about 30 minutes by foot (there was a metro strike so we had to walk, but it is also possible to reach everything by metro). Allessandra was helpful and gave us some tips upon our arrival.
But unfortunatley there was a misunderstanding with our booking; in the description it was written that we would be able to use her kitchen to prepare our meals - which we thought included dinner as well. It didn't and that was a disappointment, especially because Rome was our second last stop and there was not much money left for eating out. We saw that Allessandra has now put a clearer description about the kitchen use online so thats good.