We loved our stay here. It is small but was perfect for our party of three adults.
The balcony catches the morning sun and the two main bedrooms overlook the side road, so there wasn't too much noise from traffic, especially being 6 floors up (reliable lift!).
The other side of the apartment (bathroom, kitchen, living room with sofa bed) has an amazing view over Rome with St Peter's on the horizon – you can even see it through the tiny opened window when you're on the toilet!
It was easy to walk everywhere or catch the Metro at Cavour, there are loads of cafes, restaurants and bars nearby and a great little supermarket down the road to the right. We'd definitely stay here again.