I would like to go to Sicily and visit the main cultural and natural sites. Should I rent a car or use the available public transportation? I would prefer to use public transportation, but it is very difficult to find information on the Internet, and some sites indicate that buses are not reliable. Furthermore, it would be in summer, so I would like to have buses early in the morning and late at night to avoid the highest temperatures. This would make me vote for a car.
On the other hand, I've also heard that driving in Sicilian cities could be stressful, and taking the public transport is better to meet people. Are there any facts that could help me decide?
EDIT : here is my itinerary
first week on the East coast including 1 day in Catania, one in Syracusa, one for the Etna, one for Stromboli, one for cassagrande de cassabile and one to be defined.
second week on the West coast with Agrigente on the way, then Monreale, Palermo, Segeste and zinguro.