Marco's house was great and he was a very communicative person.
We couldn't meet Marco but his mom and uncle met us and we checked in smoothly.
The house is about 10mins walk to Vatican city and there is a bus stop in front of house.
It was nice and cozy but next door neighbor was playing hard rock music in the evening and we felt like that we were in concert but overall it was pleasant stay in Marco's house.
We would recommend it!