As a recommendation from a local, who explained beforehand that Sicilian pizza is different, that they use whole grain and the crust is thicker etc, we went to Calvino twice. Did not book in advance, had to wait about 15m to be seated and another 15 for the pizza. As we stayed in the counter top area at the entrance, I cannot really rate the interior. The Rianata pizza was delicious, indeed salty as others mentioned, but I guess it was because of the baked Pecorino and anchovies. I loved the taste, the crust and the serving, all cut in cubes in front of us.

Finally, for me, a simple tourist, I found the staff and their story very charming. The place is run by a Calvino, a grumpy looking man who does everything still with a pen and notebook. Inside the visible oven area, his son and other employees. Staff was ok, like I would expect in an old Trapani pizzeria, not too fakely polite as in a McDonalds... patience is the keyword, I got everything I came in for at the end of the day, which was a good pizza and a cheap dinner. I paid 9 for a medium Rianata and 6.5 for a small Diavola. No coperto, as I was not seated.

Note that I was there end September, so I might have avoided the annoyances of others regarding waiting time.