Me and my friend spent a long weekend in Francesco's appartment. Everything was as described - the flat is not very in the center, but that is clearly shown on the map. And with a few stops on the tram you reach the main station easily. Handling keys, cleanness and communication were without hassle. Flat is super sunny and stylish.
The one negative thing, but this is very individual, is the noise from the many cars in front of the building. I am very sensitive with hearing, so it was maybe worse than it actually is. But to be honest, Rome IS loud, wherever you go. If you want it quiet, go to Jyväskylä in Finland. :)
No reason why you should not rent the appartment.