We had a great stay in the apartment. It is very well located, not far from the Roman forum, and in a quiet place. +1 for the air conditioning during the heat wave. Luca's father was friendly and speaks French which is very appreciable.
On the other hand there are some negative points that I would like to share :
Concerning the cleanliness, there were traces of dirt and mold around and in the shower. The towels were dirty and the dishes were badly washed. The bed was very hard, we woke up with aches and pains every day and the pillows were not comfortable. The two mattresses next to each other forming a double bed were always coming apart, leaving a hole in the middle that had to be closed again and again. In addition, there was only one fork when there were two of us.
To conclude I will say that the apartment is good for a really short stay and it did not prevent us from loving our trip to Italy.