The apartment is in a great location, especially if someone plans to visit the Vatican museums early to beat the crowds. We went almost everywhere on foot, even though we have a young child.
Silvia was also an excellent host. On the first day, we arrived late, because we missed our metro stop. Silvia waited patiently for us, even though we arrived around 20 minutes late. At some point, we asked for extra towels and Silvia brought enough to us. At the last day, she allowed us to check out several hours late. She didn't have to do any of these things. Going the extra mile like this shows what an excellent host she is.
The only thing someone has to be careful, is that inside some buildings in Rome, like where we stayed, the mobile signal reception is good mostly near the doors and windows.
Not only we enjoyed our stay in the eternal city of Roma because of the sightseeings, but also because we had a wonderful place to stay and great interactions with the host.