The apartment is great, located within walking distance from everywhere interesting in Rome, Fabio & Francesca were very welcoming and informative about the area, and even left us some groceries for breakfast!
La Casina is on the ground level which was very nice for us as I was traveling with my 6 yo daughter, 2 min from Piazza Navona, 15 minutes from the Vatican there is also a shuttle from the airport that stops 10 minutes walk from the place.

two small things the you might want to consider:
1. we had a slight odor of mold from the walls
2. the wi-fi only worked when the door was open (?!)

I would definitely recommend La Casina to anybody visiting rome, mainly because of the location and the hospitality of Fabio & Francesca.