Everything in the apartment was as described and fully functional. We didn't have a single problem during our 7 day stay. The location was great - Cipro metro station is on 2 minutes walk and there are also bus stations around. There is a very good Roman market just down the street and a 24 hour open Carfour near the metro station. Adriana was an excellent host - she met us on the metro station, took us to the apartment and told us all the important things on arrival.
Although it is not directly in the historical center, I would definitely recommend this apartment to anyone that wants to explore Rome at its fullest. If you are OK with going by foot you can also walk to Piazza Navona, Piazza de Popolo or Trastevere in around 40 minutes - we found that it was a pleasant walk in each direction we took.