Building was too old and not kept up well. But the location made up for it.
Metro station was too far to take to some of the historic sites such as Colosseum, Roman Forum, Palatine & Capitoline Hill but the good thing is that you could walk to all the sites and taking a taxi was more convenient (also a safer option with regard to pickpockets).
The location is just fantastic - right next to the Trevi Fountain, 5 mins walk to The Pantheon and several other places.
Also, close (10 - 15 min walk) to Quirinale, Spanish Steps, Piazza del Popolo, Piazza Navona, Altar of the Fatherland etc. Central location for seeing all the historic sites of Rome. About 10 mins taxi ride to The Vatican, Colosseum, Roman Forum. It's better to walk to these places or take a taxi instead of the metro.
Great restaurant right below the hotel, other great restaurants and gelato places within a block.