Trastevere is a beautiful area, full of fantastic restaurants. Francesco’s apartment is very much local, a few minutes walk and you are in the centre. The apartment is spacious and comfortable.
The location is also ideal for sightseeing with the Vatican a 35 minute walk one way and the Colosseum 25 minutes walk the other way across the Tiber. Most of the other sites are similarly a short walk. There are also plenty of transport links if your legs are tiring!
I would also recommend a train from the airport to Trastevere station (less than half the cost of the €100+ taxi return). Buses run regularly outside and it’s half dozen stops to the apartment (about 8 mins).
Highly recommend this apartment.