Much longer review then I normally write...
Positives - great central location within walking distance of the main Roman sites, great restaurants in the immediate area (definitely eat lunch at Dino's Express. It's a true Roman experience. They don't even have prices listed, menu constantly changes and is hand written on notepad paper (quite inexpensive) and not a tourist restaurant). They even carried our table outside and placed it in front of the paint store next doors entrance (that was closed for their 2 hour lunch, what an experience!). This was one of the recommendations Paolo provided in a binder, very helpful. There is also a great patisserie around the corner with all in-house made pastries that is definitely a locals spot that has been there since at least the 50's (inexpensive too and offers apertivo in the evening between 6-8pm). We stayed in Room #3. It has nice modern decorations, is quiet and plenty of hot water.
Negatives - first evening the toilet ran all night (even after flushing several times); the air conditioner over the bedroom entrance constantly dripped a lot of condensation when it was on, creating a puddle on the floor that soaked two towels. In all fairness, it ended up being better opening the balcony door and bathroom window, but with the bathroom door open I had to wear ear plugs to sleep (toilet stopped "dripping" in the wall the next morning for no apparent reason :)). If it were the summertime this would have been a MAJOR issue instead of a major annoyance the first evening; both the bathroom sink and bathtub were clogged. It was corrected the next day; the extra pillows on the bed smelled bad and were in great need of being washed; however, Nadia, who cleaned our room and checked us in, was kind enough to provide us two more pillows and extra towels the next day (as well as additional toilet paper since only half a roll was initially provided). I would more consider these apartments than a true b&b because what is provided in the kitchen is very basic. That said, take the money you saved and walk to a nice patisserie.
All in all, I wouldn't tell people to not stay here, but to be aware of the initial issues we had so they can avoid them.