We were a group of 3 people, who stayed for 5 days in Fabio's apartment, at the beginning of July 2014.

The good:
1) The apartment looks exactly as the photos show. No surprises.
2) It's cosy and it was very very clean when we checked in.
3) The apartment is fully equipped. WiFi is working without problems, TV, manual espresso machine, it even has a hairdryer.
4) There was not any problem communicating with Fabio from the very beginning. He responded quickly in all my questions before I arrive, and he was waiting for us at the apartment, althouth our flight had a delay.
5) The location of the apartment is excellent. It is between two Metro stations, and 5 min walk from Termini, where there are train and bus stops located working 24h/day.
6) Fabio even provided us with supplies when we checked in, such as coffee,tea, sugar, shampoo and dishwashing liquid.

The bad:
1) The apartment is located on the ground floor, in a place surrounded by other blocks of flats. At least one of the windows is opposite the toilet of a nearby apartment, just a few meters away, which means it is not confortable to open the window.
2) The neighborhood is not one of the best of Rome. Dirty, with homeless people, and full of shops of immigrant people.You cannot say that it is not safe, but I wouldn't say either that a woman for example would walk comfortably at nights.
3) On one hand it is good that the owner did not bother us during our stay, so he respected our private lives. On the other hand, in my personal opinion, I would want he had shown some interest in case we had some problems. For example, some of the supplies finished (toilet paper) and we had to buy our own. I would expect that, having paid a considerable amount of money for 5 days, I wouldn't have to pay extra for such kind of minimal things.
4) Some tips Fabio gave us, wasn't the best. For example he suggested a supermarket for us, but we finally found a much better one at Termini. Moreover, he suggested us a laundry shop in order to deposit our luggage since we had to check out early, and our flight was leaving late afternoon. Although we checked in two different shops, in the street he told us, we couldn't find the one Fabio recommended.

To sum up, although we confronted some minor problems, in total, we were very pleased and satisfied with the apartment and the owner himself.