Our family of four (including twin 13 y.o.s) stayed at Paola's apartment for a week. Paola was a great host -- she was with her family on holiday when we arrived (not unexpected because it was Christmas) but she was in constant contact with us, starting when we landed at FCO. She also arranged for transport from FCO to the apartment, which was great after a red-eye and cheaper than Uber.
The apartment was perfect for our family. It was exactly as described, in a building/neighborhood that felt safe. The apartment was well appointed with a fully-functioning kitchen, ample linens/towels, comfy beds, and it was spotless. It is only three blocks from the Vatican, 1-2 blocks from the subway, a block from Fatamorgana gelato, and a quick walk to Panificio Bonci (must go). We would recommend for any travelers, esp families.