Federica is a wonderful host, she picked us up from the station 20 minutes away from her house and made us feel at home. In the morning she prepared breakfast and even made me a coffee :)
Her house is 40 minutes away from the city center and you can do it by catching a bus right across the house and train to tiburtina station then you will be in the city center.
Federica helped us a lot with the bus and train schedule. Her response is prompt and very useful!
If you want to relax and have plenty of time I really suggest you to stay here as the house is beautiful and it's even better than the photos.