I went to Rome with my wife and We stayed at Termini Guest House, Rome. It is very near to Rome Termini station, it is walkable distance. And near to public transport and food courts.
This guest is better than what we expected. Very clean house and great hospitality by Emanuela and her husband. Especially we liked the way they treat us when we're in hurry to go out and know that we may miss the breakfast at house they provided the coupons for breakfast.
I would recommend the other guests this Guest House.
Srikanth.