My stay at Sergio's was excellent. Not only did he offer precise directions about how to get to his house, but once we sat down for the formal check-in, he went over a map of the city with me and gave me detailed information about site-seeing and places to eat and workout. His room is enormous, and well furnished, including a refrigerator that I accidentally left some food in :(. The bathroom is also large, including a fancy and spacious bathtub and a shower. The best thing about his place though by far is the location - just blocks away from Roma Termini and the Santa Maria Maggiore. Sergio is of course a gracious host as well, and made sure to check up on me regularly every evening. I would recommend him to anybody.