Casa Calpurnia was amazing, a beautiful apartment that came with fresh fruit, a kitchen, wifi and a computer, and many other amenities. It is five minutes walking from the Colosseum, but our favorite parts of the neighborhood included Twin's Gastronomia for espresso and cappuccinos, and a walk away from the colosseo took us into a park with parrots, koi fish and ponies!
Lovely place, Claudia is a very nice host, would definitely stay again. Well worth the price, and with great bus/metro access to all over Rome.