Paola's place is great. We had us and three kids and we fit fine.
She and her dad were very nice and arranged reservations for us at a local place when we got in late the first night. Paola also joined us for a trip to the Vatican Museums.
The apartment is very close to the Metro Linea B which is convenient if you plan to buy passes for public transit. Short bus ride to one of the less visited but impressive catacombe sites.
Overall, A+ for Paola and her effort to make us comfortable. Hope to visit again!
Arrivederci!