We had a lovely time in Frederica's flat. It is central, clean, well-equipped and spacious. This place is not only a flat to stay but has a homely feeling. It is very central and close to many good restaurants and bars. We have walked pretty much everywhere from the flat.As other reviews said it can be noisy due to people drinking outside but there is little Frederica can do. Use earplugs if you are concerned.
The host was friendly and waited for us until we arrive. We were delayed due to issues with our train but they kindly waited for us and showed us around in the flat.
If we ever visit Rome, we will look to book this place again.