Our stay at Gabriele's place was really great. It's in 5 min walking distance to St. Peters Basilica and has good access to public transportation to i.e. colloseum area. The city center is within walking distance (20 min) so a flat rate public transportation ticket wasn't needed at all.
The apartment is very nice and feels comfortable from the first day.
Gabriele will organize a shuttle for you from airport to apartment if you like. For us it was definitely worth to save that time and spend it on seeing the city.