Federico's apartment is fully equipped , with a lot of space for a family of 4. Everything is well organized.
The neighborhood is really quiet and well located if you like walking ( 20 - 30 mins to the centre ) especially if you cut through the trastevere which is full of nice bars and trattorie.
Negative point was the smell inside the apartment caused (for me)by the time that was closed before and the high levels of humidity in the area.
Overall it is a good option.
We haven't met Federico ( just his father and his staff) but all of them are really polite , helpful and professional.