It is not true that you can get to the city center within 30min. Buses in Rome are horribly unreliable and they were source of extreme suffering for us. During the weekend we spent more than an hour on waiting and travelling with buses that didn't come or arrived late or were stuck in traffic. We missed both of our tours due to messy bus schedules.
The apartment is gorgeous and we loved how traditional Peruan touches were making it homey and unique for us. It was truly sparkling clean and Adriana was the loveliest host.
However, we had issues reaching her via phone upon arrival and also upon departure.