Fantastic place! Very confortable, airy, clean and and nicely decorated apartment with all the basics well covered, and some nice extras too! Great bed, well-equipped kitchen, strong wifi, 2 air-conditioning units, washer, dishwasher, a little balcony. The place also has nice views and it's very quiet given that the living area looks out on a garden on the side of the building and the bedroom is at the back, looking down on the city below. The walls seemed rather thin, but he neighbours were very quiet at night when I was there and I slept super well.
The communication with Ruggero prior to the arrival was quick and smooth, but best of all, he turned out to be extremely sympathetic and very knowledgeable about the art and architecture of Rome.
A little tip: Even if the metro Cipro is only a few minutes away, it is a bit of a climb up the hill, so to save energy, I usually took the #49 bus that starts at Piazza Cavour and stops right in front of the building, or the #46 bus that stops nearby and gets you to and from Piazza Venezia in just a few minutes.