What a great stay in Rome! The apartment is in a great "local" location (i.e. not in the midst of all the tourists).
Marta was a great host - she was very helpful in making sure we had all we needed prior to our visit and locally we met with Rowena to get checked in. There were absolutely no problems finding and getting access to the apartments.
The apartment was clean and comfortable (we were a party of 2). The kitchen had all we needed for us to make our Sunday dinner at home. WiFi access in the home was great from the main areas - the bedroom was hit/miss (probably because of all the thick walls).
We felt very safe. The neighborhood and surrounding areas gave us absolutely no worry.
We chose to walk or taxi to all our sites. It costed about 15 euro's for our taxi trips to Rome Termini train station and it cost 12 euro for a taxi to Vatican City. We averaged about 4.7 miles per day as we walked home to/from the other major sites.
There is A/C in the apartment, but Rome weather was beautiful while we were there (mid Oct), so we only opened windows when it was warm.
I would recommend this apartment if you don't need to be in the midst of the tourist locations.