Overall: 4/5
Upkeep of space: 5/5
Location & accessibility: 4/5
Host hospitality: 3.5/5
Communication (via AirBnb): 5/5

The host, Chiara (Valter's daughter), was friendly and helpful. I wouldn't say she went above and beyond, and may have actually fell short of my expectations of an engaged host, but my stay was still pleasant and the location and space is certainly great and exactly as advertised. One of the best pieces of advice that Chiara gave was to purchase a skip-the-line ticket to the Vatican Museum from the ORP office (ask her about it). It was well worth the additional ~15 euros to save 3 hours of time idling in line + a tour guide.

It is worth noting that I traveled individually and over the New Year's period, and so I can understand if Chiara (who also lives in the apartment) wanted to spend her time with family, rather than with her AirBnb guests (there is another room for other guests in the apartment as well). Many other reviewers have alluded to her promptness and patience when receiving you initially, and this is certainly true.