Our family of four (2 adults, a 4 year-old, and an infant) had a great stay in Daniela's apartment. The listing was completely accurate, and the apartment was clean and well-appointed. Daniela had set up a travel cot for our baby and a sofa bed in the living room, as we'd requested. She was also very flexible with check-in, as we arrived earlier than expected. Daniela responded quickly to all our emails and was helpful with the one minor apartment-related question we had while in Rome.
The apartment is on the 1st floor (i.e., up one flight of stairs). The building has an elevator that just fit our Uppababy Cruz stroller and was convenient for getting luggage in and out. We walked to most sites and restaurants from the apartment, though the metro, buses, and taxis are also available nearby.
Overall, Daniela's apartment worked out very well for us, and we'd happily recommend it.