Our stay at Fabio's apartment was great. We didn't meet Fabio, but his father was there to give us the keys (he only speaks Italian, but it wasn't a problem, as Fabio was very clear) and the next morning we met Marco, Fabio's brother.
The apartment is a bit overpriced, but we were very close to the centre (10 min to the Duomo) and it was worth it. It was really clean and overall really accurate and nice. The only issue was the shower, the water stayed there after taking a shower for more than an hour.
I'd recommend it to anyone who wants to be able to walk anywhere, and doesn't mind spending a little more.