The flat is close to Termini and Tiburtina stations and close to the Villa Borghese (<5min walk), but you need to take the bus to go in the center of Rome or other monuments.. the flat is also very close to several bus stops.. but the bus system in Rome isn't very efficient.
Otherwise the flat was nice with nice furniture and very confortable bed.
The problem is the smell: cold tabbacco and humidity smell.. and the flat wasn't very clean. (Some sheets didn't smell very clean)
Alessandra is very nice and very helpful ! Thanks for this weekend in Rome :-)