If you're traveling and you have 3 or more people, stay here, reserve it now, your search is done. In the top 3 Airbnb places we've stayed in terms of space, location, cleanliness, and host. We stayed 6 days and it was fantastic.
Plusses: great location-- right by a market/shop, bus line easy to get to, easy walk to train, good restaurants and great gelatto places and bakeries in walking distance (including 1 of the Roman classics, Pasticceria Siciliana Svizzera), easy walking stroll to St. Peter's as well (tip: go there in late afternoon, the tourists have left so there's almost no line and you can do the free walk inside without stress). Bus is pretty much 30 minutes to anywhere in Rome (counting waiting time)-- we got from our place to the Mouth of Truth then the Campo di Fiori and back all within a single 100-minute bus ticket time window (with a bit of hustle).
Also great inside-- actual space to sleep the 5 of us (none of this 'fits 7 in a shoebox', instead there are 2 full bedrooms plus the living room pull-out). We had 2 adults and 3 teens and everyone had enough space. Kitchen was good (we made homemade pasta one night). Great light, and the view from the balcony was wonderful. We went in mid-March and the weather was good, too.
Hosts were great-- Ludovica even set up our airport pickup & dropoff, and made restaurant recommendations and had other great tips.
I know all-positive reviews are boring but this was a great place for our first trip to Rome!