Enjoyed my stay, loved the terrace. I will stay there again. A few things to know:
The apartment is actually much bigger than the photos show, though i only used the bedroom.
You can hear the main elevator from the apartment — a lot. Supposedly no one uses it after 11:30 pm but i heard it during the night and early morning. Also I had the unfortunate luck of guests next door with screaming kids and loud adults which really was a drag.
I found the self check-in OK but there are 5 different keys with a lot of directions (2 different elevators, take the stairs after 11:30 pm, etc.) so I did not use the elevator that goes directly into the apartment. I was contacted by "S. Stefano Apartments" on my phone which felt quite corporate, not like a host you meet or see, I didn't know if that was Rambaldo or who it was. The bedspread was a dark red, not the beige you see in the photos, so the bedroom feeling was not as light and airy as the photos. But the apartment is very clean.
The location was good as it's not in the middle of town and it's a nice walk around S. Stefano. And the little terrace makes this apartment special.