We'd certainly return here (if Ari will have us) the next time we come to Rome. The apartment has a fabulous location in the Monti area within walking distance of most of the major sites. It's very pretty, quiet and spotlessly clean, and has everything you'd want to make a stay in Rome pleasant, including very good WiFi (important for me as I needed it for work). It certainly lived up to its description. Ari is a charming and generous host who met me on arrival and explained how everything worked. She left us tea, coffee, milk, jam, bread - all the things for an Italian breakfast, along with maps, guides and so on, which we found very useful. The one thing readers of this review need to note is that it is on the 5th floor and there's no lift. That means it's wonderfully bright and quiet and it wasn't a problem for us -- in fact we loved the narrow stairs as they are so picturesque -- but if you have very heavy luggage bear this in mind.
Altogether much to be recommended! A big thank you to Ari for offering this flat to guests and maintaining it to such a high standard.