Francesca's place is in one of my favourite Roma areas - very close to Sant Angelo. It is less touristic, but still full of things to see, nice cafes and restaurants, groceries and souvenirs shops. Tiber is here, so enjoy walks over its banks..
But the main thing - from this apartment you can walk everywhere! Vatican is just few mins away, Navona - have a slow walk up to 10 mins. Pantheon - add 5 more. We even walked to Colosseo and Forum, and never used public transportation.
The apartment itself is very clean and cozy. The bed is good, medium hard and medium soft (i love hard mattresses, my fiancee likes soft ones, but we slept good). Shower seems to be new and boiler is working really well - i took pretty long showers, and water never went to cold. Elevator works great too.
What else... so the building stays in a quite lively street, which means that there is certain noise from cars (not from people - no music, no loud conversations, just cars). If you are a light sleeper, keep in mind that around 8am you may start hearing honks. However... it's Italy, so it will never be too quiet.
Francesca was very responsive, nice and friendly, she answered all our questions shortly, so our stay was smooth and safe.
I would definitely recommend this place for stay!