My friends and I stayed at the Etruscan B&B for 4 nights. The Etruscan is conveniently located right across the Termini station. So as you get off the train from Fiumicino, you just need to walk a good 5 minutes and you're already knocking on the door of the apartment where this B&B is located. It's located inside a residential apartment where there's a courtyard in the middle. I actually found it quite refreshing to be surrounded by all the tranquility of a residential area yet at the same time be right beside the always busy Termini station. The B&B is located on the second floor. But there's a lift so you need not drag your luggage into 2 flights of steps. There are only 2 bedrooms, one common bathroom and a kitchen. But the place is squeaky clean and quiet. I personally didn't mind sharing the bathroom, though I am very picky about bathrooms, because with just 2 rooms and the bathroom being cleaned everyday, it would still feel that we have the bathroom for ourselves. As soon as you check in, which was easy to do with the friendly English speaking staff, you're given the keys to your room and the apartment, and you're pretty much on your own. We were given breakfast coupons which we availed of in the Termini station in this newly opened cafe that serves good croissants and capuccino. Not bad for the price we paid per night.
I will definitely stay at the Etruscan B&B again when I go back to Italy because it allowed us the possibility of doing day trips to Naples and Florence conveniently aside from going around Rome.