Great location, even though you have to go through a huge tunnel to get to central Rome on foot (but you can make a detour through San Peter, which is pretty cool).
The apartment is good enough for a week in Rome. Not much to cook in the kitchen but the minimum. There are two main problems : humidity and the fact that you can hear the apartment next door as if people were sitting next to you. We visited in November, so it was very humid. But I guess summer is better. And for the neighbours, it's not a place to party anyway, so not that disturbing in the end.
Overall, don't expect much and it'll be perfect. That's what we did and we enjoyed the trip!