We stayed for 2 nights with Sergio. He has a beautiful apartement in a great neighbourhood. You enter a beautiful courtyard through a gate and from there you can walk to the apartement on the second floor. We really enjoyed staying with Sergio. He explained everything we wished to know, had great suggestions for the best dinner/lunch/breakfast spots and was really friendly. He is very flexible, so we could leave our luggage at the apartement during our last day in Rome (we flew in the evening) which was really convenient for us. We didn't get the chance to chat with Sergio very much because we were away most of the time but he came across as a very kind person.