Daniela and Fabrizio offered amazing hospitality. They arranged for a van to pick us up from the airport and greeted us with wine, cake and fruit. They then gave us a ton of suggestions on where to eat and what places to visit. They had even printed out a list for us to take with us. And when they discovered that my sister is a tennis nut, they arranged to pick her up the next day for a tennis match at their club!
The place itself is super spacious and has all the amenities you'd need. No hotel could compete in terms of space, comfort and location. It's situated fairly close to all the sights in Rome.
P.S. I should also mention that the building has an elevator.