This 'hidden attic' is well worth your visit! It lies a little outside the touristical centre, and that's a good thing! Since the island is so small, it's still within walking distance of anything you want to visit.
The only thing you might want to keep in mind is that it ís an attic.
That means that in summertime, since you're sleeping under the roof the sleeping-temperature is pretty high. (during my stay there was a heatwave in Europe (and Venice) and the temperature never dropped below 30° in the room)
Next to that, you can only acces the room using a ladder.
Now I didn't mind any of those things, but I can imagine for some people it's good to know in advance when you're booking it.
Other than that, Sabrina was the perfect host, speaking English very well (luckily, because my Italian is non-existing) and with a very good overall communication through the Airbnb-app.