This is a great place to stay. The location is in a quiet friendly area, and the bus to the center is easy and quick. We had one day where the buses were on strike and just walked into the center instead, our 6 and 8 year olds managed it ok, and it was nice to walk through the other areas.
The flat is spotlessly clean and had everything we needed. We couldn't park outside as our rental car was too big for the spaces nearby, so we left it with the garage around the corner for the for 5 euro a day, which worked fine. It was also a pretty easy drive into this part of Rome when we drove up from Naples.