As others have mentioned, this apartment was well located in Trastevere, 2 minutes from a lively square, with many restaurants in the ear vicinity. It was a slightly longer walk to many of the standard sights, as you must cross the Tibor, but that wasn't a problem for us.
As the apartment is located in a courtyard and has only a few windows, it was remarkably quiet considering it's so close to the action.
It had great working wifi, and our hosts provided a nice fruit basket when we arrived.
They also arranged for a driver to pick us up at the airport. It was a rather chaotic meetup, as many many drivers were there and we couldn't find ours for some time. Germana (our host's representative) was very helpful in getting us synced up.
All in all, a very enjoyable locale, we recommend it!