Marco was a great host. I didn't meet him as my friend arrived before me. She added an extra night on the booking and Marco was very accommodating, allowing for last minute changes that I feared might cause him hassle. He gave her a very comprehensive welcome tour, with lots of local info, and he even offered to book us taxis etc for the airport when left.
The place itself is lovely. Two spacious bedrooms with doubles and pull-out sofa-beds, two modern shower-rooms. A washing machine, iron are provided too, as well as Wifi (mobile). Location is great - walking distance to the metro (maybe 4-5mins), although we walked into town to the Vatican, Pantheon etc. which took about 20 minutes.