I'll name a few things that were great about Liviana / her place.
I had basically 2 nights / 1 day to spend in Rome prior to my train ride to the airport and back home. Her location is pretty close to the train station which made it ideal.
It was pretty central to all the monuments and such I wanted to visit in my 1 day. I would say a 1 hour walk and you could hit up a bunch of the locations and get some good food along the way.
The room itself was exactly how it was described. All my stuff was safe and never had any issues. There is no AC, but the room is well ventilated - with two opposite windows so a nice breeze passes by. The nights I were there, it wasn't warm so it was ideal. You also are provided your own bathroom so thats great. My only hiccup - very minor - was, one of my keys was the wrong one - but we got that situated the next morning.
While it was great to be in Rome, I think even the 1 day was ideal - so Liviana's location was perfect.