It was a great experience. The flat has a perfect location, easy to reach the railway station in 5 minutes walk, or 15 minutes to San Pietro and Vatican. The bus station is in front of the flat, also supermarket, chemist's and lot of places to have lunch or dinner in case you want to spend the night in the neighbourhood, which is safe anyway.
Lorenzo was very friendly and helpful, he gave us all the info we needed and explained in detail what we could visit during 3 days.