The apartment was exactly as described and more. We are 2 adults and 2 kids, and felt really comfortable in it. It's surprisingly big, even bigger than we thought it would be, specially due to the high ceilings.
It was clean, and had everything it said it has, including laminated papers with local recommendations.
In terms of location, this is mainly why we chose it: it's literally in the center of things. 4 minutes walk from the Pantheon, and less than 10 minutes from sites such as Trevi Fountain, Piazza Navona or Piazza Venezia.
Daro, the host, was super helpful and resourceful prior to our arrival, and was very responsive. Upon our arrival, we met his colleague, Orsetta, who was responsive just as well. We communicated through Whatsapp, and she waited for us in front of the building, took us in, and explained every little thing until we felt at home. Also, she helped us get transportation to the airport on the day of our departure.
I would definitely recommend this place to all of you who are looking for place in the center of things in Rome.
Ciao.