The location is fabulous, literally 30 seconds walk from the Colosseum. It took us about 5 minutes to the metro station, also great. We even walked to the Vatican and back in a couple of hours.
The apartment itself was satisfactory, nothing really stood out in a positive or negative manner. Except for security. That was great. You have to go through 3 doors with different locks (PIN, keys) to get to the apartment, makes you feel really safe.

Would go there again.