In short, everything was great. Claudia is an excellent host. She met us, explained everything we needed. Also, we had some requests during our stay, and she helped us a few hours after asking.
A few words about location: it is great, you can see Basilica di San Giovanni from a window. The coliseum is fifteen minutes by foot. And there are lots of shops around here. The windows overlook a big and pretty noisy street (Via Appia Nuova), so if you have a light sleep, then this can be a problem. But the sounds of the street didn’t bother us.
And let's talk about the apartment itself. It's big enough and comfortable to live with two people for a month. There are a big bed, a nice couch, and very warm blankets. The kitchen is small, but it didn't stop us from cooking. The main thing is that the internet connection was excellent. We use two laptops with zoom meetings and no problems with that.