The apartment was close to lots of important landmarks in the centre. On a quiet (enough) side street, it was close to good public transport links - buses and taxis. There are 2 grocery stores close by and a couple of nice restaurants (if you can ignore the grumpy waiting staff!) Da Buffetta and Da Francesco.
Gaia was a lovely host. She organised airport transfers and was able to accommodate a late checkout for us. She explained everything about the apartment and the locality. She will keep you right in Rome!
The apartment had everything you would need for a comfortable stay in the city.
I would definitely stay here again.