The room was very nice, clean, comfortable for 3 persons.
We had our own keys, so we could come at any moment.
The breakfast was in cafe nearby, there was really kind and helpful waiter. :) He gave us croissant, italian cafe, and there was one small buffet table too.
The B&B is not far from centre, you just have to cross the bridge.
Vatican is just few minutes walk. :)
We've got good experience, if we came again to Roma, sure we will sleep here again !!!