Location, location, location. Walking outside to the Piazza Navona early in the morning is magical. And the rooftop is as good as it looks. We really enjoyed watching the activity late into the evenings. Despite its central location, the apartment is quiet from the inside. And the lift made it easy to get upstairs.
The rooms are adequate but a bit more basic than they look in the pictures. The layout is a bit funky, but we had six people and all stayed very comfortably.
There was always someone there to greet us and to help us arrange transportation. Overall we really enjoyed our stay.