We (6 adults, 2 kids) stayed at the "Suite degli Angeli" for 4 nights, everything regarding the apartment was perfect. Alessandra and her team made sure a shuttle service picked us up at the airport and dropped us off at the apartment. We received a warm welcome, the apartment is spacious and clean. We got a crib for our little one (almost 2y old) and a special setup for our big one's bed (4y).
The bathrooms are clean and nice (though the door of one of the shower cabins was a bit loose). The kitchen is well equipped, the table in the kitchen is a bit too small for a party as large as ours (6 ppl are ok).
Although there's a large shopping street right next to the apartment, we never heard noise from the street, we slept very well. The apartment is located in walking distance to the Vatican, you can reach St. Peter's Dome within less than 10 minutes and Castel Sant'Angelo within less than 15 minutes, the subway station Ottaviano is within 5 minutes' range.