To begin with, the location is incredible. The apartment is on a charming little street with lots of neat restaurants nearby, including right next door and across the street. Five minutes of walking and you're at the Colosseum. Less than that to be among the ruins of the Forum. You'd be hard pressed to find a better location in Rome, though of course that depends on your preferences.
The apartment itself is clean, stylish, and well appointed. The pictures are perfectly accurate: the place does look that great. The only issue would be for tall people, as the wood beams are rather low. At 5'7", I had no problems, but my husband is 6'2" and he had to duck to walk through the hallway and kitchen. Not a huge issue, but something for taller people to keep in mind.
Clara herself was very nice and helpful. Not only did she leave the fridge stocked with a few supplies (milk, drinks, jam, etc.), and leave a nice, helpful list of nearby restaurants, but she also emailed me while we were staying there to let me know about a neat show they do at night over at the Forum. Again, just about a two minute walk away.
Overall this is a fantastic little place that I highly recommend.