The apartment is located on the eastern side of the street, just a few hundred meters south of the Vatican city. Along the street there is a lot of pizzerias, icecream bars and a very nice bakery (for the morning bread) as a neighbour in the street. Yes, there is a lot of traffic daytime, but not at all unbearable, and it is less in the night. Also the jalousie takes away some of the sound, and at the samt time makes it dark in the bedrooms. We had no problem to sleep, and it was cool and nice even without AC (in june). The kitchen is perfect for a small family, easy to use. There is a partly sunny balcony with 4 chairs, perfect to use in the night when the children are asleep and you want to enjoy the mild climate, but don't want to leave the apartment. Unfortunatelly a big tree is taking away most of the view, but at the same time makes the balcony lush. The other balcony is outside the kitchen, our small children liked to be there in the mornings, in the shade. The apartment has white stone/marble floor in all rooms, feels really nice! The washingmachine made it easy to clean our small childrens shirts, perfect!
We wanted to walk to the centre of Rome and Trastevere, but it was really hard to walk southeastwards, due to the road (no sidewalk in the southern parts), and also there is a big hill/ridge between the street and the river. We didn't know that when we arrived, but we walked north to St Peters and then eastwards to reach the centre of Rome. It was ok and only took like 15-20 minutes. We only took the bus the last day, to the station.
It is a really nice apartment, and our children refered to it as "the hotel". We didn't meet Giovanna personally, but her nice and serviceminded son met us when we arrived. He fixed the tv the first night, and Giovanna sent some extra glasses with a maid when we asked for it.
I recommend this apartment, we were 6 persons and it was perfect in size for us, even if the table in the kitchen is more suited for 4 (we didn't eat breakfast at the same time, so it was ok for 6 as well...).