If you can get this place, you should. It’s on a very quiet street that’s right in the middle of everything. About 15 minutes walk to the Colloseum, about 20-25 minutes walk to the Vatican, about 30 minutes walk to Galleria Borghese. Right around the corner is a nice plaza with a variety of restaurants. 15 minutes walk puts you across the river to the Trastevere neighborhood, which is also very nice.
At the end of the day you come back to a very comfortable 1st floor flat - 3 bedrooms, 1 for a child and the other two large enough for 2 couples. The mattresses are firm, which was good for my back after a long day walking.
The Host was perfectly attentive to anything needed for the apartment. One of the nice parts is they offer you a car service from the airport (you’ll need to pay the driver directly - about 50 euros) but this was about the same or a little less than other ways to get into town (there were 3 of us) and it was a big relief that the driver knew exactly where to go. In addition, if you use the car service the host knows exactly when you’re arriving and can be right there as you arrive.
Absolutely recommended.