The good:
Location, service, communication.
Andrea met us at the apartment and thoroughly explained everything and answered all our questions. He also responded promptly when I messaged him during our stay. The location was the best. A few minutes of waking to get to the Colosseum, cafe nearby, supermarket nearby, restaurants nearby.
The not so good:
The mattress; I've had lower back issues and sleeping on this mattress was a miserable experience for me. Every night I had back pain. Maybe for some it would be ok, but for us this was the biggest issue.
Note: there was also a tax we had to pay in cash upon arrival. €3.50 per night per person.