We've been staying at Claudia's place for about a month in September. It's a really comfy renovated place with everything you might need for a long-term stay.
The location is around a 20-30m walk from the Colosseo. This is a one-story house in the courtyard of a high-rise building. The area seemed very quiet and safe to me. There are several grocery stores, bars and restaurants nearby. We enjoyed the stay a lot, Claudia was a very nice and friendly host, she helped us a couple of times. Recommend this place :)