Pros:
Carmen is wonderful
Carmen's homemade biscuits are also wonderful
The rooms are airy, bright, spacious, and clean
The bed is comfortable
The shops and restaurants in the area stay open late and are much, much less expensive than those in central Rome
You're staying in a non-touristy, university area near Rome's version of Chinatown
Location is close to bus, tram, and metro stations

Cons:
A bit far to realistically walk to the sites; a level of comfort using public transportation is required.