The apartment is very nice, new and elegant, and all details are thought out. The high quality of the materials - wood floor, kitchen, lighting - makes you feel that you are in a high end place. The bed is very comfortable, as is the couch. Anything we could think of needing was already there. The wi-fi is very fast and the air conditioning works well. In reality, the apartment stayed cool enough that we ended up not needed it even in the middle of a heat wave!
Alessandro is a great host: he let us check in early, had a bottle of prosecco in the refrigerator for us, and checked regularly if all was fine and whether we needed anything. The apartment is very conveniently located close to the train station, and near some of the must-see sights in Rome. Definitely a great place to stay in.