Very professional service. Extremely clean and a true reflection of the posting (great high ceilings). Location is excellent in terms of proximity to Termini (main train station for entering/exiting Rome and main bus station) and a metro line. Frank was away but was very helpful by providing detailed information, and his assistant Jonathan did an excellent job of settling us in (and saving us when we left our keys inside!).
Our only suggestion is to get familiar with Rome's buses, as walking back from areas such as Trastevere (great food / bars) is a bit of a hike and cabs aren't a great option.
We would definitely stay here again (and hope to be able to in the near future).