I'll echo what everyone here has said about this place in the past. The apartment is very central to a lot of neighborhoods, sights and attractions. My wife and I were able to get some much done in a short amount of period because it was easy to walk or travel everywhere. I would book this place again in a heartbeat if I come to Rome again.
We did not get to see Rosa in person but she was very nice from the start and offered us rides to and from the airport if we needed it.