Very comfy stay at Ben's Testaccio apartment. The outdoor terrace was great and I loved the super quiet sleeping nook (which is reached from a staircase). Testaccio is not exactly walking distance to the center, but it's easy to jump on tram or bus. Nearby is one of Rome's best gourmet food stores-- Volpetti, and there's a good natural food shop and proper super market. So if you want to live like a real Roman for a few days, this is your place.