Our stay at Victor and Emma's place was generally good. There were very accommodating in an early arrival for one of our guests. It was very clean and the location is amazing. I cannot think of a better location to stay at whilst visiting Rome.
However, you should be aware of the following:
1) There is only one bedroom, not two - the other bedroom is the living room with a sofabed.
2) To get to the bathroom, you must walk through the only bedroom so there is no privacy if there is a group staying.
3) The shower in the bathroom is TINY. Some members of our group had trouble even using it.
4) There was a loose tile in the shower that fell off when a member of our group closed the shower door. We are now debating with Air bnb who's fault this is. The member of our group was almost seriously injured because of the tile smashing at her feet.
5) There isn't really any free parking, just what's available on the street.

I think if Victor and Emma perhaps fixed some of these points or at least made them clearer then it would have not been as disappointing. But, as I said, the place was very clear and the location is amazing.