This apartment is in an ideal location, just steps from Piazza Navona with quick walking access to the Pantheon and the Trevi Fountain. Upon arrival, Alessandro (Papa Carlo's son) met us at the apartment. He discussed the place with us as well as told us how to contact him if we needed anything.
The only down side to this place was the dank, mustiness of the bottom floor. Because it is underground, there is a lot of moisture in the air. This, however, did not bother my dad and I as the basement only includes the kitchen, dining room, and an extra bathroom.
Overall, the location of the place and hospitality of the owners made this a place we would gladly go back to.