Location and Size!
As your feet are the best way to see Rome, this place is perfectly central. Easy walking distance to Colloseum/ Forum/Capitoline Museum, only about 5 blocks from Termini( the nice safe side), Barberini and Trevi over the hill and S.M Maggiore on the doorstep! Via Urbana has some interesting funky restaurants, not tacky tourists spots. Good supermarket just steps away.
It's hard to find accom in Rome with beds for a family of 5, that is decently priced. Two bathrooms was an added bonus. The kitchen is the only communal space, and is very small, but we didn't spend much time inside the apartment, too much to do and see in Rome.
The area is noisy, so earplugs might be helpful if you are a light sleeper. Also the apt is on the 3rd floor, so heavy suitcases not recommended!
As a host Alessio is brilliant. Nothing was too much trouble, and his communication was great, even before we arrived. He was helpful and personable and his English was great.
Would definitely recommend for a large family!