The view from this apartment is insanely beautiful. My girlfriend and I just sat up there for hours looking at the Duomo and drinking wine while the sun was setting. You can see the entire city around you/below you.
Also, Luca was very responsive. We had one question about the apartment and he answered within one hour.
The building itself is about a 25 minute walk from the SM Novella train station and a 5 minute walk from the Duomo. We never used public transportation and just walked everywhere instead.
This place would be perfect for two or three people. The single bedroom is separated from the main bedroom/living space by a little hallway. The beds aren't great, but the view makes up for it.