Casabianca is in a great location, being close to a grocery store (literally under the apartment building), a bus stop (about a 3 minute walk), and a subway station (about an 8 minute walk) . It's perfect for visiting Rome without a car. Sara was wonderful about quickly answering any questions we had, like how to get to the Colloseum, and where to get bus tickets. Her husband met us at check-in and was very nice and welcoming. The jacuzzi was a really appreciated amenity after walking all day.
Just a warning, expect to see a LOT of graffiti around, and shops put down metal doors when closed. We weren't expecting this, since it's not like this where we live. It made us a little nervous at first, but, everyone we met was friendly and we felt safe. Just look above the first floor and buildings look much nicer. The apartment was great and had everything we needed, except for a clothes dryer. It rained off and on all 3 days we were in Rome so we couldn't hang our clothes outside and they didn't throughly dry inside before we left.
Tip: Be sure to visit Billy's Ice Cream shop. Delicious! It's right by the subway station (metro).