Everything was just perfect!
The location is comfortable enough even if you wanna walk at night.
It was easy to get to apartment from Fiumichino airport using the train.
There's a bus 46 which goes from Vatican to all famous attractions (Pantheon, Fontana di Trevi, Piazza Venezia etc). I had an amazing view from my balcony to Basilica di San Pietro!
Also the room was very clean, the furniture was new and nice. The hostess always left snacks at the kitchen, and the kitchen itself was clean and well equipped.
The hostess is a very nice woman, she advised me where to go and what to see.
It was really the best choice to stay with such a host!