Absolutely amazing apartment! There's little I can say that hasn't already been said by others, but I really want to emphasise how great this place is. It's perfectly situated in the centre of Rome, with all the major sites being within walking distance.
In terms of value for money I don't think you could find a better apartment, with it being so beautifully situated down a cute little backstreet but just a short walk from the sites and all the restaurants and nightlife.
Alberto and his collaborator, Guilia, were wonderful in arranging transfers to and from the airport, and letting us leave our bags at the apartment when we arrived early and again when we checked out late to fit around our flights. This meant we had five full days to enjoy Rome and didn't have to wait around in a café with our bags until the place was ready like we would have done with a hotel.
If you're thinking of visiting Rome I couldn't recommend a better place!