I stayed one night at Avec Moi.
The place is very well connected as there's a bus stop just outside the bnb, and is only 5 mins from two underground stations, B line.
The room was very clean and every comfort in place ( air contitioning, tv, extra pillows and blankets) and also there's a very big breakfast area.
The owner, Michele, is very kind and happy to help if in need.
I definitely recommend Avec Moi and, if in Rome again, I'll happy to come back.