Thanks to Lis Mari, because I had not the pleasure to thank directly.
We stayed before in bedrooms with low ceiling, and short showers I have home, and all these means less then the romantic aspect of the apartment and its price. Distances to major attractions not bother me, because the bus 44, which is the end line at the Palazzo Venezia, get us in the middle of these objectives, and 870 will lead you the Vatican (do not go there on foot, especially at night, because there are portions of road with heavy traffic, without sidewalks). The only small problem was the street noise and the neighbors above steps (until midnight), but to pass by these there is a solution that will be appreciated by your wife/ girlfriend too: red wine, which in Italy is cheap and good