Stayed with my mom at Marco's place for 8 days during May. Being the great host that he is, Marco made sure to meet us at check-in to make a full and detailed explanation about the apartment and the neighborhood. He had so many useful tips and advice about Rome that made our trip much more special and productive.
The apartment is well equipped, there is all you need for a comfortable and relaxed stay.
Many central sites are within walking distance, but if necessary, public transport (metro and bus) is just a 2 minute walk from the apartment and gets you everywhere you need.
we had a great stay and would highly recommend it for others :)