Ideal in every way. We stayed in the Piazza Mercanti flat for a night but wish our time there had been longer; the apartment is so comfortable, quiet, and centrally located! We loved everything about it, including our helpful and accessible hosts, who made sure that we had everything we needed, even checking on train connections to the airport for us.
The apartment itself has tasteful modern finishes and all the amenities, including a nice bath tub and air-conditioning. The building and surrounding streets were very quiet and quaint, but easily accessible to the bustling historical center of Rome and all of the sights. And the great neighborhood restaurants and bars of the Trastevere are only steps away, too.
Highly recommend booking this lovely flat! We hope to visit again soon.