The apartment was in the perfect location to see the city, especially if you're a first time visitor. Nearly everything was walkable or their is a taxi stand around the corner from the place if you need. Amazing restaurants and coffee shops, shopping boutiques and markets all in the immediate vicinity. The place is on a small local street. It is a little noisy at night with the windows open, but quiet if you keep them shut with the a/c that worked great.
We stayed for a week with two kids. Four adults would not work well though, so just be warned as the second bedroom is small with trundle beds and you need to walk through that room to get to the full bath. Fine with kids, but I can see it to be a challenge with adults. The kitchen works for small things, but no more than simple meals. But being in Rome you might not even use it. We only used it for breakfasts for the kids.
Wifi worked great. Host was extremely helpful and communicative!