The place is as you see in the pictures. Within short walking distance, you have the metro (which is important when visiting Rome) and several grocery stores (there is a stove in the apartment if you have the strength after the day to cook something). Personally, we liked the Supermercato Elite better, although it closes at 20:00 Mon-Sat and 13:30 on Sundays (opens at 08:00 every day). The other is Carrefour Market which is 24/7 and will do just fine as well, it's only personal preference in my eyes.
The host is wonderful, get WhatsApp and make sure to have a data plan with roaming, will make it very easy to stay in touch if necessary. Arianna greeted us at home (helped getting on the right metro line on the way) and even helped order some pizza for the first evening.
I definitely recommend this for a visit in Rome.