Roberto was a nice and uncomplicated host. He quickly showed us around the apartment provided us with some essential information, for the rest of our stay we hardly ran into each other.
The apartment itself is very spacious, modern, well-equipped and neat. We enjoyed the beautiful terrace, also the fridge (important because the weather was super-hot) and kitchen were the perfect size and we found everything we needed. The secound terrace also turned out very handy because we could use it to hang dry our clothes.
We came by car and parking was no problem. We found a space at the trastevere station. Public transport was pretty chaotic though, the metro didn't work on plan and the tram neither, so we had to use the less comfortable bus a lot. If you go to Rome, better doublecheck whether and how ATAC works during your stay :) the Trastevere neighbourhood is very beautiful and entertaining at night and just a 15 min walk from the apartment.
I definitely recommend staying at Roberto's place.