We spent 4 nights in Rome. Location of the apartment is perfect - few steps to metro station and then 15-20 minutes to the city center. Even with small kids it is very convenient. Room and bathroom were spotless clean. The host is very communicative and helpful - you can contact him during your stay with any kind of problems you may have. Unfortunately the WiFi was broken during our stay but Emanuele offered us his netbook so we were able to check emails and weather :)
However we have two comments: 1. Our room was located on the first floor and it was facing a very busy street. It was impossible to open the windows at night because of the noise. Sleeping with AC on is not very convenient for us but others may find it OK. 2. 'Free parking on premise' does not mean you have a free parking place ready and waiting for you. We were informed by Emanuele that it means that you can leave your car on the street and there is no parking fee in the area... In Rome, finding a parking spot may cost you a lot of time and stress. Fortunately we had luck and found a place in 10 minutes (the host offered us his help if we had problems).