This apartment has plenty of room to spread out. The terrace is lovely and offers both sunshine and shade all day/evening long. The apartment was well stocked and has a bathroom larger than most in Rome.
The location is great, you'll find very friendly locals and very few tourists(the best way to see Rome). Mad for Beer is a great soccer bar, you've got two groceries within 50ft of the entrance, and plenty of restaurants. The Market at San Giovanni di Duo(your tram stop) is the best in town.
You are a quick Tram #8 ride to Trastevere, Campo de Fiori, and Piazza Venezia/coliseum. Plus the H/971/981/870 busses that drop you of right by the Vatican.
Elisa gave directions on how to get to her place quickly from the airport, allowed a flexible checkin time, and made sure we had everything we needed. She answered within a few hours each time we communicated.
I'll be staying here again :)