The host was very welcoming: helped us to get around in the neighbourhood and even ordered a taxi for us when we were leaving to the airport.
The apartment is indeed very small. There was not enough hot water for two people to get a shower, and the Internet connection is not accessible in every part of it.
But the terrace is amazing: with nice view on Vatican. We were able to enjoy lying in the sun already in the end of March. The place is awesome!