Vincenzo's place is a lovely little flat, it has everything you need. I was met near Termini station by Vincenzo's friend who was lovely. Vincenzo doesn't have much English but he met us at the apartment.
It is quite a safe area as it's near a lot of embassies so security guards are quite common. My only issue was that there seemed to be a group of at least 50 people arriving to a building on the same street every single night and would make a lot of noise for about half an hour, would disappear, then reamerge at about midnight again and walk back down the street (making lots of noise again). This is no fault of the host and I'm not sure this would happen all the time but it happened every night I was there. Other than that the location is good, right near a train stop and buses very close by. 2 supermarkets also just around the corner.