I stayed at Domus Nora for four weeks after moving to Rome from the UK and I cannot fault any part of my experience.
The room I stayed in (Room 2) was spacious, clean, and well-designed, and the bed was incredibly comfortable!
Domus Nora is siutated in Garbatella, which has a real charm in itself - there are plenty of shops and cafes, with easy walks to Basilica San Paolo etc. But the metro (just over a 5 minute walk from Domus Nora) will also take you directly to Circus Maximus (2 stops) and the Colosseum (3 stops) without having tourist crowds (and their noise) around you at all times.
However, what I appreciated most of all was the hospitality of Eleonora and Alessia, who were always welcoming, kind, and helpful. They really made my first few weeks in Rome so much more relaxed and enjoyable, for which I will be forever thankful.
I would not hesitate to recommend a stay at Domus Nora.