Federico's place suited my sister and I while we visited Rome. It is in a great tucked away place, with nearby restaurants, convenience stores, and a pharmacy (we needed ibuprofen while in Rome). It isn't too far way from the Trevi Fountain nor Piazza Navona. I remember being pleasantly surprised when my sister and I left Piazza Navona and ended up near Federico's place.
The room is spacious, clean, and well equipped. The bed is comfortable and super comfortable. I loved that in the bathroom Federico provided a little box of additional toiletries (cotton pads, cotton swabs, even a sewing kit!). The bathroom was also clean, with ample towels provided for two people.
Upon our arrival, the lamp was not working, but it was quickly replaced. The woman who let us in (I forgot her name, but she was fantastic!) even provided a map with some suggestions of different places. My sister and I felt safe the entire time, so ladies don't feel hesitant!
Would definitely stay here again if/when I'm ever in Rome again!