Donatella's place is the perfect place to stay in Rome. It is located in a quiet and safe neighborhood (as a female travelling alone, I felt at ease staying at Donatella's place). It is so close to the metro line which makes it convenient to get to and from the airport and many attractions around Rome. What I found the best about this place is the distance to the Vatican (I spent two days exploring Vatican City and walked around everywhere).
It is really nice having your own space, Donatella's place is perfect for that. Private washoom, bedroom, and balcony.. what more could you ask for? It was extremely clean and had everything I needed for my stay in Rome. Donatella and her brother are so hospitable and nice to talk to. Her brother speaks English which made a lot of the communication for me easy.
I would definitely stay here again if I came back, grazie!