Others have said this, but I have to repeat it: this is a wonderful apartment. Daniela is a superb host, welcoming and warm, always available, and offering helpful suggestions.
The apartment itself is a pleasure. It looks just as good as the photos, and the views are even better in person. The location is great--the neighborhood doesn't have a touristy feel but the major sites are an easy walk across the bridge, and an even easier tram ride a minute or two away. Location couldn't be better.
One of our favorite things was sitting on the big private terrace watching the sun go down behind the done of Saint Peter's.
So between the lovely apartment, gracious host, and fabulous location, we had a great vacation and would recommend this to anyone.