Silvio is a very nice and kind man and very helpfull. He showed us one of his other appartments, he arranged taxi from and to airport, and showed us how to get around. He took us in his own car and showed us the fantastic view over Roma from a spot near by the appartment. very helpful.
The appartment is about 45 min walk from The Vatikan and Campo di Fiori, ½ hour walk from Ponte de Sisto Trastevere, 1 hour walk at least from Trevi Fountain. But busses near by go to the center.
We stayed 6 people in the appartment, but it is not suttaible for more than 4 people. It is very small, old and damaged and it was dirty. Clean sheets and towels though.