Great location! Short walk to the Colosseum/Roman Forum and Trevi Fountain/Spanish steps, and right by Republica to take the metro to the Vatican. Really close to the train station as well.
Very quiet except for when people leave/enter the other section of the building through the metal gate down below. It seemed to be more frequent on the weekend with people opening/closing the gate until midnight.
Check-in was a breeze, and the host was very helpful. Would definitely stay here again.
The apartment is on the 1st floor (floor above the ground floor) with a spiral staircase if you're wondering.