First of all, the apartment has a hallway with many doors so it's quite private. The room was larger than it looks in the pictures. It was nice. The location was great! Very close to the Vatican. There is a Metro stop and a bus stop about 1-2 blocks away so it's very easy to get to the main area with all the other attractions.
The best part of staying with Donatella was the hospitality. She is a warm and friendly host. Her brother gave me a 15-minute walk around the neighborhood, pointing out the Metro and giving advice on places to eat.
If you are a foodie, the famous Pizzarium Bonci is about one block away, although Massimiliano recommended Alice Pizza, where two delicious slices of pizza and a bottle of beer were only 4 Euros!