We had a wonderful stay at Giulia's place. The location is perfect on a quiet area of Trastevere, with lots of wonderful restaurants and shops nearby. Right next to Trastevere's main street and transportation, yet quiet. It's a couple of blocks away from the Tiber river and all Roman attractions.
The apartment was spotlessly clean. It's the perfect size for a comfortable stay (we stayed a week). Very efficient and well equipped. The bed was excellent.
The spiral staircase to the bedroom area is a bit tight, but one gets used to it fast.
Giulia is an excellent host.
We wholeheartedly recommend Casetta di Trastevere.