Very close to metro CIPRO, literally just a few minutes walk to there, very convenient. Also, it is close to Entrance of Vatican Museum, just a 15 mins walk could bring you there.
Simonetta is nice and friendly, she helps me plan my travel and gives me useful advice, breakfast provided is also nice, with coffee/tea/bread/cereal/fruit. She even helps me do the washing, but there is no dryer for the clothes, so it takes time to get the clothes dry, especially in rainy days.
Room cleaning is also provided, i stayed for 7 days and is always clean. One thing to criticize is that the electricity run out at around 12:00 at night, besides that my experience at this place is good.