Enrico's apartment is an outstanding location. There is an elevator to the apartment, however, there was stairs once inside. It is split among two (three) floors, you walk into the kitchen, go up a flight of stairs to the lounge room, and then another flight of stairs to the rooms and bathroom. One of the rooms, the bed is lower to the ground than most places, so just have that knowledge when deciding who gets which room.
Apart from that the apartment had all of the touches needed to make it a great stay. It was a 20minute walk to the Vatican and then about 15 minute walk to the Spanish Steps.
I would stay here again if ever back in Rome.