The apartment is located in a beautiful and convenient location. There are a lot of restaurants and shops very close by. In terms of sightseeing, the Vatican is easily within walking distance and we walked to most of the other attractions as well - although buses are fairly convenient from Trastevere.
The apartment itself is equipped with everything you could need - fairly easy to cook for yourself etc. Fabia kindly left us guidebooks and maps about Rome and advice on how to get around. Checking in and out was incredibly flexible and my friend and I were both provided with keys to the apartment. Overall, I couldn't have asked for a better experience in Rome and I'd love to stay there again!