I was in Rome in a group of four people. For us, Lavinia's apartment was perfect in many ways. It's clean and spacious, has everything we needed for a weeklong stay, and is close to just about everything in Rome. Many sights are within a 25-minute walk, and some are within less than five, like the Piazza Navona, the Pantheon, and great coffee at Caffe Sant Eustachio. It's remarkable how central the apartment is. If you're like us, and prefer to walk than take public transportation, the location is ideal.
Lavinia is conscientious and a very fast responder to emails. On one of our last nights, we texted her with an issue about the washer door and she came to the house to deal with it while we were out to dinner. I haven't had other Airbnb hosts do that before! She is very sweet and really wants guests to have a comfortable stay. Another thing she did to make sure our trip was problem-free is she let me know ahead of time that there was a taxi strike on the day of our arrival. She booked a car to pick us up from the airport, and then when we left (after the taxi strike had ended) she booked a taxi for that trip as well. Both our drivers were polite and charming. If you need a taxi or private car for anything, you should let her know!
The one thing I would mention, that some other reviewers have also mentioned, is that there is construction on a large building near the apartment, so the early mornings can be loud. If you're a light sleeper, it's something to consider; if you're not, or if you wake up very early anyway, it's not.
Finally, I would recommend that guests use the food recommendations that Lavinia put together! We went to three of the places on her list of restaurants and we were pleased every time.
Absolutely recommend to other travelers to Rome!