first of all, the house is sooo well decorated and enjoyable to stay in! it was really nice to spend time there. Costanza has such lovely cats that don't come in unless you don't let them, and both are pretty well behaved and good companies that make your stay lovelier:) we especially enjoyed having our breakfast and coffees on the balcony, but the downside is whenever the upstairs neighbour would water their plants or wash their balcony, the water leaked into ours and we couldn't use it for days:( but when we could, we really enjoyed it.
the house is located in a pretty central location. it's only 1 stop away from termini and on the same metro line with many touristic places. and the quarter is much nicer than termini imo.
the only thing was that Costanza did not always answer messages so fast. i just once asked if a certain kitchen tool was in the house and couldn't get an answer until around 5 hours later and we no longer needed it. also during check out, i couldn't reach out to her through airbnb messages (we don't have italian phones) and had to leave our keys to a lady upstairs since we were in a hurry.
all in all, i would recommend staying here. we really enjoyed it!