Lorenzo was very easy to contact before and during our stay. He was also very helpful in booking our transport to and from the airport . He was very warm and welcoming, despite the fact that we were 4 hours late due to flight delay and despite needing to go and check another party in elsewhere, he still took the time to show us around the apartment and show us where we were on the map. Make sure to ask him where the supermarket is - it's not so easy to find unless you have an address.
The apartment was as expected and really well located. The kitchen space is very small, but we didn't need to use it, so I cannot comment on how it functions (although I am sure it is fine). The shower is also interesting, with a big step up into it, so not good for anyone with mobility problems, but it worked just fine with plenty of hot water.
We traveled with two teenagers, so the two fold out couches in the living room were essential and they did the job for a weekend.
The apartment is truly located just around the corner from the Spanish Steps and the metro station. We walked most places, but used the metro to go to the Vatican (walked back) and the Coliseum and took the bus back. There is also a bicycle and moped rental place just outside the entrance to the metro nearby.
As we already knew from other reviews, the restaurants downstairs do get noisy when they pack up late at night and when they set up in the morning, plus there is the street cleaner that goes past in the night. Ear plugs are recommended. It was cool enough at night when we were there to close the shutters, the windows and the curtains (and run the fan for some air circulation), but I think it would be very noisy if you slept with the windows open. Also, you have to squeeze between the tables to get to the front door at busy times of day - the waiters are friendly and helpful though (they even carried our bags out when we left!).
This was our first Airbnb experience and it was great! We would happily do it again. We recommend this apartment in terms of value for money, comfort and convenience and the host for being easy to contact, quick to respond and very helpful.