Enzo was a very lovely host and even picked us up at the airport for 40 euros, which I recommend since it is hard to find the appartement on your own. As Enzo is only speaking italian, a dictionary would be good at hand.
The appartement is not directly in the city centre of rome, but on the outskirts. With metro and underground it took us 45 minutes to get to vatican for example (we wouldn''t recommend to take the busses since they are always very very full).
It was clean and tidy in the appartement and Enzo had some biscuits and water waiting for us.
Supermarkets are nearby (5 minute walk).
Unfortunately the picture with the balconies is a bit confusing, as we expected a big balcony to sit on, which was not the case. There is a balcony, but it is very narrow and you can barely sit on it.
All in all I can recommend this appartement if you are okay with spending a bit of time in the metros, busses and undergrounds to get to the city centre.