This is a great, simple apartment run by a friendly and responsive host. The location is very good. It's walkable to the Colosseum/Forum and Trastevere but far enough away from the tourist hordes that you can feel like you're staying in a typical Roman neighborhood, which you are. There are several excellent restaurants, bars, delis, pastry shops etc. nearby.
Bibi was happy to let us check in early after an overnight flight. She was waiting outside the flat to greet us on arrival, and had snacks and drinks on offer. She does not speak much English, but communication was never a problem. A little Italian and Google Translate go a long way. I'd definitely stay here again.